Imgui: Post your color styles/themes here

Created on 19 Jun 2016  ·  43Comments  ·  Source: ocornut/imgui

I have decided to include a few better color themes in the default packaging, perhaps as soon as next release (1.50).

The reasoning is that I want to do it to reduce the like-hood of people actually messing up too much with styling themselves. In small part because this is taking people time, and in big part because custom themes are easier to break and create a situation where I am more cautious to change the styling system. So I'm hoping to provide a better baseline with named themes that people are happy with, that we maintain and actually not encourage people to do too much skinning until ImGui is actually ready for it.

1.A.
I would like to improve the existing default theme. Most probably, the main button colors needs to be changed, they are the worst looking now. A slight amount of tweaks to the current default theme would be a good freshening move. If you are in a creative mood please try to have a look at tweaking the default theme :)

1.B.
I would like to add new themes. Please submit yours with suitable screenshots here! I was thinking probably at least a black-ish theme, a white-ish theme. Probably one or two more. While discussing we need to be considerate that slightly transparent windows are useful to many users who are overlaying windows over their game/contents. While this isn't a deal-breaker, it is nice if a theme both work with fully opaque background colors and will slightly transparent colors. You may also submit shots of other software for ideas/references, tho I am hoping to get straight to the point and getting actual settings integrated.

2.
I also would like, if possible, to find a practical way to showcase font changes without adding new building/compatibility issues to the examples/ applications. In particular, depending on the toolset/build system used, the starting directory may be variable and make it a little more work to use external files such as the one exhibited in extra_fonts/. That's solvable.

Related topics

438 simplified design

184 new design / colors (not doing right now).

help wanted in progress style

Most helpful comment

A cherry theme :D

image

void CherryTheme() {
    // cherry colors, 3 intensities
    #define HI(v)   ImVec4(0.502f, 0.075f, 0.256f, v)
    #define MED(v)  ImVec4(0.455f, 0.198f, 0.301f, v)
    #define LOW(v)  ImVec4(0.232f, 0.201f, 0.271f, v)
    // backgrounds (@todo: complete with BG_MED, BG_LOW)
    #define BG(v)   ImVec4(0.200f, 0.220f, 0.270f, v)
    // text
    #define TEXT(v) ImVec4(0.860f, 0.930f, 0.890f, v)

    auto &style = ImGui::GetStyle();
    style.Colors[ImGuiCol_Text]                  = TEXT(0.78f);
    style.Colors[ImGuiCol_TextDisabled]          = TEXT(0.28f);
    style.Colors[ImGuiCol_WindowBg]              = ImVec4(0.13f, 0.14f, 0.17f, 1.00f);
    style.Colors[ImGuiCol_ChildWindowBg]         = BG( 0.58f);
    style.Colors[ImGuiCol_PopupBg]               = BG( 0.9f);
    style.Colors[ImGuiCol_Border]                = ImVec4(0.31f, 0.31f, 1.00f, 0.00f);
    style.Colors[ImGuiCol_BorderShadow]          = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
    style.Colors[ImGuiCol_FrameBg]               = BG( 1.00f);
    style.Colors[ImGuiCol_FrameBgHovered]        = MED( 0.78f);
    style.Colors[ImGuiCol_FrameBgActive]         = MED( 1.00f);
    style.Colors[ImGuiCol_TitleBg]               = LOW( 1.00f);
    style.Colors[ImGuiCol_TitleBgActive]         = HI( 1.00f);
    style.Colors[ImGuiCol_TitleBgCollapsed]      = BG( 0.75f);
    style.Colors[ImGuiCol_MenuBarBg]             = BG( 0.47f);
    style.Colors[ImGuiCol_ScrollbarBg]           = BG( 1.00f);
    style.Colors[ImGuiCol_ScrollbarGrab]         = ImVec4(0.09f, 0.15f, 0.16f, 1.00f);
    style.Colors[ImGuiCol_ScrollbarGrabHovered]  = MED( 0.78f);
    style.Colors[ImGuiCol_ScrollbarGrabActive]   = MED( 1.00f);
    style.Colors[ImGuiCol_CheckMark]             = ImVec4(0.71f, 0.22f, 0.27f, 1.00f);
    style.Colors[ImGuiCol_SliderGrab]            = ImVec4(0.47f, 0.77f, 0.83f, 0.14f);
    style.Colors[ImGuiCol_SliderGrabActive]      = ImVec4(0.71f, 0.22f, 0.27f, 1.00f);
    style.Colors[ImGuiCol_Button]                = ImVec4(0.47f, 0.77f, 0.83f, 0.14f);
    style.Colors[ImGuiCol_ButtonHovered]         = MED( 0.86f);
    style.Colors[ImGuiCol_ButtonActive]          = MED( 1.00f);
    style.Colors[ImGuiCol_Header]                = MED( 0.76f);
    style.Colors[ImGuiCol_HeaderHovered]         = MED( 0.86f);
    style.Colors[ImGuiCol_HeaderActive]          = HI( 1.00f);
    style.Colors[ImGuiCol_Column]                = ImVec4(0.14f, 0.16f, 0.19f, 1.00f);
    style.Colors[ImGuiCol_ColumnHovered]         = MED( 0.78f);
    style.Colors[ImGuiCol_ColumnActive]          = MED( 1.00f);
    style.Colors[ImGuiCol_ResizeGrip]            = ImVec4(0.47f, 0.77f, 0.83f, 0.04f);
    style.Colors[ImGuiCol_ResizeGripHovered]     = MED( 0.78f);
    style.Colors[ImGuiCol_ResizeGripActive]      = MED( 1.00f);
    style.Colors[ImGuiCol_PlotLines]             = TEXT(0.63f);
    style.Colors[ImGuiCol_PlotLinesHovered]      = MED( 1.00f);
    style.Colors[ImGuiCol_PlotHistogram]         = TEXT(0.63f);
    style.Colors[ImGuiCol_PlotHistogramHovered]  = MED( 1.00f);
    style.Colors[ImGuiCol_TextSelectedBg]        = MED( 0.43f);
    // [...]
    style.Colors[ImGuiCol_ModalWindowDarkening]  = BG( 0.73f);

    style.WindowPadding            = ImVec2(6, 4);
    style.WindowRounding           = 0.0f;
    style.FramePadding             = ImVec2(5, 2);
    style.FrameRounding            = 3.0f;
    style.ItemSpacing              = ImVec2(7, 1);
    style.ItemInnerSpacing         = ImVec2(1, 1);
    style.TouchExtraPadding        = ImVec2(0, 0);
    style.IndentSpacing            = 6.0f;
    style.ScrollbarSize            = 12.0f;
    style.ScrollbarRounding        = 16.0f;
    style.GrabMinSize              = 20.0f;
    style.GrabRounding             = 2.0f;

    style.WindowTitleAlign.x = 0.50f;

    style.Colors[ImGuiCol_Border] = ImVec4(0.539f, 0.479f, 0.255f, 0.162f);
    style.FrameBorderSize = 0.0f;
    style.WindowBorderSize = 1.0f;
}

All 43 comments

The theme I'm using is setup via the function SetupimGuiStyle in this Gist, based on the light style by @itamago.

I modified this slightly to unify the treatment of alpha, and added functions to switch between light and dark and to vary the background alpha.

For the main font I use Roboto-Regular.ttf at 18.0f size, and Fontawesome using includes from IconFontCppHeaders.

Dark Style, no alpha. 2016-5-19_11-47-55_avoyd_3
Light Style, no alpha.  2016-5-19_11-47-48_avoyd_2
Dark Style, medium alpha. 2016-5-19_11-47-32_avoyd_0
Light Style, medium alpha. 2016-5-19_11-47-38_avoyd_1
Dark Style, low alpha.  2016-5-19_11-48-18_avoyd_4
Light Style, low alpha.  2016-5-19_11-48-34_avoyd_5

Hi @ocornut ,
it's not my intention to hurry you :blush: , but do you have an estimated time of release for 1.50 with these themes enhancements?

Another thing: since there are at least _four_ unofficial ports of imgui to _emscripten_ it would be nice to have an official one inside the base library. On the plus side, once wasm webassembly becomes mandatory in browsers that will come as a free bonus.

My bests,

--RM

I'm sorry Roberto I can't give ETA. From mid-month I will resule work on navigational controls and colors will be looked after that.

I also can't take on any new projects and anything-emscripten would be a new thing to think about. I don't know emscripten and can't take informed decision. If anyone of those four persons are serious about giving to the community and maintaining something then they are free to sort the projects out themselves and submit something to the official repo if they think it makes sense. Devil in the details and sorting/maintaining/presenting is lots of the work I can't do it for them. I can't either force it nor merely suggest to anyone, as most contributions are one-shot and adding me more work. People contributing without being asked to are more likely to keep things working in the long run :)

Hi Omar and thanks for the response,
I fully understand you since for me as well time is today a really scarce resource.
I did one port >1.5 year ago to emscripten but frankly I don't know where I put it.
At this moment I'm not using imgui in my projects since they are mostly web-based and to get imgui in I'm waiting for webassembly to be standard and default in all browsers.
If and when that happens I'll be glad to port it and contribute (and to drop all the CSS/browser/JS libraries madness for a more stable mutiplatform solution).

Navigational controls? do you mean more nifty things like a docker panel (seen 3 around), tab management? (I wish it :smile: )

Thank you for the nice piece of code and for keeping it tiny and simple.

--Roberto

Please post your styles here!
For 1.50 because it is a nice number I would like to work and add those new color themes :)

i'll post my theme here when finish my work .
btw , you have a very skilled artist friend (benfiquet) , i think he can help with this .

here is mine
imgui

ImGuiStyle& style = ImGui::GetStyle();
style.WindowRounding = 5.3f;
style.FrameRounding = 2.3f;
style.ScrollbarRounding = 0;

style.Colors[ImGuiCol_Text]                  = ImVec4(0.90f, 0.90f, 0.90f, 0.90f);
style.Colors[ImGuiCol_TextDisabled]          = ImVec4(0.60f, 0.60f, 0.60f, 1.00f);
style.Colors[ImGuiCol_WindowBg]              = ImVec4(0.09f, 0.09f, 0.15f, 1.00f);
style.Colors[ImGuiCol_ChildWindowBg]         = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_PopupBg]               = ImVec4(0.05f, 0.05f, 0.10f, 0.85f);
style.Colors[ImGuiCol_Border]                = ImVec4(0.70f, 0.70f, 0.70f, 0.65f);
style.Colors[ImGuiCol_BorderShadow]          = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_FrameBg]               = ImVec4(0.00f, 0.00f, 0.01f, 1.00f);
style.Colors[ImGuiCol_FrameBgHovered]        = ImVec4(0.90f, 0.80f, 0.80f, 0.40f);
style.Colors[ImGuiCol_FrameBgActive]         = ImVec4(0.90f, 0.65f, 0.65f, 0.45f);
style.Colors[ImGuiCol_TitleBg]               = ImVec4(0.00f, 0.00f, 0.00f, 0.83f);
style.Colors[ImGuiCol_TitleBgCollapsed]      = ImVec4(0.40f, 0.40f, 0.80f, 0.20f);
style.Colors[ImGuiCol_TitleBgActive]         = ImVec4(0.00f, 0.00f, 0.00f, 0.87f);
style.Colors[ImGuiCol_MenuBarBg]             = ImVec4(0.01f, 0.01f, 0.02f, 0.80f);
style.Colors[ImGuiCol_ScrollbarBg]           = ImVec4(0.20f, 0.25f, 0.30f, 0.60f);
style.Colors[ImGuiCol_ScrollbarGrab]         = ImVec4(0.55f, 0.53f, 0.55f, 0.51f);
style.Colors[ImGuiCol_ScrollbarGrabHovered]  = ImVec4(0.56f, 0.56f, 0.56f, 1.00f);
style.Colors[ImGuiCol_ScrollbarGrabActive]   = ImVec4(0.56f, 0.56f, 0.56f, 0.91f);
style.Colors[ImGuiCol_ComboBg]               = ImVec4(0.1f, 0.1f, 0.1f, 0.99f);
style.Colors[ImGuiCol_CheckMark]             = ImVec4(0.90f, 0.90f, 0.90f, 0.83f);
style.Colors[ImGuiCol_SliderGrab]            = ImVec4(0.70f, 0.70f, 0.70f, 0.62f);
style.Colors[ImGuiCol_SliderGrabActive]      = ImVec4(0.30f, 0.30f, 0.30f, 0.84f);
style.Colors[ImGuiCol_Button]                = ImVec4(0.48f, 0.72f, 0.89f, 0.49f);
style.Colors[ImGuiCol_ButtonHovered]         = ImVec4(0.50f, 0.69f, 0.99f, 0.68f);
style.Colors[ImGuiCol_ButtonActive]          = ImVec4(0.80f, 0.50f, 0.50f, 1.00f);
style.Colors[ImGuiCol_Header]                = ImVec4(0.30f, 0.69f, 1.00f, 0.53f);
style.Colors[ImGuiCol_HeaderHovered]         = ImVec4(0.44f, 0.61f, 0.86f, 1.00f);
style.Colors[ImGuiCol_HeaderActive]          = ImVec4(0.38f, 0.62f, 0.83f, 1.00f);
style.Colors[ImGuiCol_Column]                = ImVec4(0.50f, 0.50f, 0.50f, 1.00f);
style.Colors[ImGuiCol_ColumnHovered]         = ImVec4(0.70f, 0.60f, 0.60f, 1.00f);
style.Colors[ImGuiCol_ColumnActive]          = ImVec4(0.90f, 0.70f, 0.70f, 1.00f);
style.Colors[ImGuiCol_ResizeGrip]            = ImVec4(1.00f, 1.00f, 1.00f, 0.85f);
style.Colors[ImGuiCol_ResizeGripHovered]     = ImVec4(1.00f, 1.00f, 1.00f, 0.60f);
style.Colors[ImGuiCol_ResizeGripActive]      = ImVec4(1.00f, 1.00f, 1.00f, 0.90f);
style.Colors[ImGuiCol_CloseButton]           = ImVec4(0.50f, 0.50f, 0.90f, 0.50f);
style.Colors[ImGuiCol_CloseButtonHovered]    = ImVec4(0.70f, 0.70f, 0.90f, 0.60f);
style.Colors[ImGuiCol_CloseButtonActive]     = ImVec4(0.70f, 0.70f, 0.70f, 1.00f);
style.Colors[ImGuiCol_PlotLines]             = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
style.Colors[ImGuiCol_PlotLinesHovered]      = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogram]         = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogramHovered]  = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TextSelectedBg]        = ImVec4(0.00f, 0.00f, 1.00f, 0.35f);
style.Colors[ImGuiCol_ModalWindowDarkening]  = ImVec4(0.20f, 0.20f, 0.20f, 0.35f);

@ocornut: if you want you can choose some of the styles in my addon branch: See the ResetStyle() method here: https://github.com/Flix01/imgui/blob/imgui_with_addons/addons/imguistyleserializer/imguistyleserializer.cpp

Not all of them look nice, but this was what I could do.

P.S. Some of them are not mine at all: I just collected (and sometimes adapted) styles from other posts.

P.S. You can try them here: https://rawgit.com/Flix01/imgui/imgui_with_addons/examples/addons_examples/html/main.html (authoring attribution is displayed in the Combo tooltip, for themes I didn't make).

[Edit:] Are you going to move the ShowBorder property from _ImGuiWindow_ to _ImStyle_ ?

Thanks for the links, both.
@codz01 Ben isn't really a ux designer, he'd made something ignoring any practical real-world consideration.
@Flix01 Thanks! Yeah I should move that you are right.. I maybe should aim for that change in 1.50. I can't even remember how it ended there in the first place, probably a hasty choice I made for 1.00.

I maybe should aim for that change in 1.50

@ocornut: yes, I think touching all the style-related issues together in the same release is a good choice.

yes, I think touching all the style-related issues together in the same release is a good choice.

"all" is a little optimistic. Even changing just the border thing is requiring quite a bit of design upfront.

Copying for reference, from https://github.com/procedural/gpulib/
( https://github.com/procedural/gpulib/blob/e0bda0cd486d720a90857df9f7797722265e9312/examples/04%20Dear%20ImGui/main.c )

It turns out that I'm more and more tempted to look into making that FreeType loader official, because at small sizes it's hard to get nice looking anti-aliased fonts.

Another thing is that many styles are tested/designed for no transparency or against a known background, and look different is either of those parameter changes.

68747470733a2f2f692e696d6775722e636f6d2f6f444c593572592e706e67

theme

// From https://github.com/procedural/gpulib/blob/master/gpulib_imgui.h
struct ImVec3 { float x, y, z; ImVec3(float _x = 0.0f, float _y = 0.0f, float _z = 0.0f) { x = _x; y = _y; z = _z; } };

void imgui_easy_theming(ImVec3 color_for_text, ImVec3 color_for_head, ImVec3 color_for_area, ImVec3 color_for_body, ImVec3 color_for_pops)
{
    ImGuiStyle& style = ImGui::GetStyle();

    style.Colors[ImGuiCol_Text] = ImVec4( color_for_text.x, color_for_text.y, color_for_text.z, 1.00f );
    style.Colors[ImGuiCol_TextDisabled] = ImVec4( color_for_text.x, color_for_text.y, color_for_text.z, 0.58f );
    style.Colors[ImGuiCol_WindowBg] = ImVec4( color_for_body.x, color_for_body.y, color_for_body.z, 0.95f );
    style.Colors[ImGuiCol_ChildWindowBg] = ImVec4( color_for_area.x, color_for_area.y, color_for_area.z, 0.58f );
    style.Colors[ImGuiCol_Border] = ImVec4( color_for_body.x, color_for_body.y, color_for_body.z, 0.00f );
    style.Colors[ImGuiCol_BorderShadow] = ImVec4( color_for_body.x, color_for_body.y, color_for_body.z, 0.00f );
    style.Colors[ImGuiCol_FrameBg] = ImVec4( color_for_area.x, color_for_area.y, color_for_area.z, 1.00f );
    style.Colors[ImGuiCol_FrameBgHovered] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.78f );
    style.Colors[ImGuiCol_FrameBgActive] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_TitleBg] = ImVec4( color_for_area.x, color_for_area.y, color_for_area.z, 1.00f );
    style.Colors[ImGuiCol_TitleBgCollapsed] = ImVec4( color_for_area.x, color_for_area.y, color_for_area.z, 0.75f );
    style.Colors[ImGuiCol_TitleBgActive] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_MenuBarBg] = ImVec4( color_for_area.x, color_for_area.y, color_for_area.z, 0.47f );
    style.Colors[ImGuiCol_ScrollbarBg] = ImVec4( color_for_area.x, color_for_area.y, color_for_area.z, 1.00f );
    style.Colors[ImGuiCol_ScrollbarGrab] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.21f );
    style.Colors[ImGuiCol_ScrollbarGrabHovered] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.78f );
    style.Colors[ImGuiCol_ScrollbarGrabActive] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_ComboBg] = ImVec4( color_for_area.x, color_for_area.y, color_for_area.z, 1.00f );
    style.Colors[ImGuiCol_CheckMark] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.80f );
    style.Colors[ImGuiCol_SliderGrab] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.50f );
    style.Colors[ImGuiCol_SliderGrabActive] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_Button] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.50f );
    style.Colors[ImGuiCol_ButtonHovered] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.86f );
    style.Colors[ImGuiCol_ButtonActive] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_Header] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.76f );
    style.Colors[ImGuiCol_HeaderHovered] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.86f );
    style.Colors[ImGuiCol_HeaderActive] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_Column] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.32f );
    style.Colors[ImGuiCol_ColumnHovered] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.78f );
    style.Colors[ImGuiCol_ColumnActive] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_ResizeGrip] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.15f );
    style.Colors[ImGuiCol_ResizeGripHovered] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.78f );
    style.Colors[ImGuiCol_ResizeGripActive] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_CloseButton] = ImVec4( color_for_text.x, color_for_text.y, color_for_text.z, 0.16f );
    style.Colors[ImGuiCol_CloseButtonHovered] = ImVec4( color_for_text.x, color_for_text.y, color_for_text.z, 0.39f );
    style.Colors[ImGuiCol_CloseButtonActive] = ImVec4( color_for_text.x, color_for_text.y, color_for_text.z, 1.00f );
    style.Colors[ImGuiCol_PlotLines] = ImVec4( color_for_text.x, color_for_text.y, color_for_text.z, 0.63f );
    style.Colors[ImGuiCol_PlotLinesHovered] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_PlotHistogram] = ImVec4( color_for_text.x, color_for_text.y, color_for_text.z, 0.63f );
    style.Colors[ImGuiCol_PlotHistogramHovered] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 1.00f );
    style.Colors[ImGuiCol_TextSelectedBg] = ImVec4( color_for_head.x, color_for_head.y, color_for_head.z, 0.43f );
    style.Colors[ImGuiCol_PopupBg] = ImVec4( color_for_pops.x, color_for_pops.y, color_for_pops.z, 0.92f );
    style.Colors[ImGuiCol_ModalWindowDarkening] = ImVec4( color_for_area.x, color_for_area.y, color_for_area.z, 0.73f );
}

void ImGuiEx::SetupImGuiStyle2()
{
    static ImVec3 color_for_text = ImVec3(236.f / 255.f, 240.f / 255.f, 241.f / 255.f);
    static ImVec3 color_for_head = ImVec3(41.f / 255.f, 128.f / 255.f, 185.f / 255.f);
    static ImVec3 color_for_area = ImVec3(57.f / 255.f, 79.f / 255.f, 105.f / 255.f);
    static ImVec3 color_for_body = ImVec3(44.f / 255.f, 62.f / 255.f, 80.f / 255.f);
    static ImVec3 color_for_pops = ImVec3(33.f / 255.f, 46.f / 255.f, 60.f / 255.f);
    imgui_easy_theming(color_for_text, color_for_head, color_for_area, color_for_body, color_for_pops);
}

Another one from an old software (may not be up to date)

Based on @Pagghiu theme

mc2001

childwindows

// Setup style
ImGuiStyle& style = ImGui::GetStyle();
style.Colors[ImGuiCol_Text] = ImVec4(0.31f, 0.25f, 0.24f, 1.00f);
style.Colors[ImGuiCol_WindowBg] = ImVec4(0.94f, 0.94f, 0.94f, 1.00f);
style.Colors[ImGuiCol_MenuBarBg] = ImVec4(0.74f, 0.74f, 0.94f, 1.00f);
style.Colors[ImGuiCol_ChildWindowBg] = ImVec4(0.68f, 0.68f, 0.68f, 0.00f);
style.Colors[ImGuiCol_Border] = ImVec4(0.50f, 0.50f, 0.50f, 0.60f);
style.Colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_FrameBg] = ImVec4(0.62f, 0.70f, 0.72f, 0.56f);
style.Colors[ImGuiCol_FrameBgHovered] = ImVec4(0.95f, 0.33f, 0.14f, 0.47f);
style.Colors[ImGuiCol_FrameBgActive] = ImVec4(0.97f, 0.31f, 0.13f, 0.81f);
style.Colors[ImGuiCol_TitleBg] = ImVec4(0.42f, 0.75f, 1.00f, 0.53f);
style.Colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.40f, 0.65f, 0.80f, 0.20f);
style.Colors[ImGuiCol_ScrollbarBg] = ImVec4(0.40f, 0.62f, 0.80f, 0.15f);
style.Colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.39f, 0.64f, 0.80f, 0.30f);
style.Colors[ImGuiCol_ScrollbarGrabHovered] = ImVec4(0.28f, 0.67f, 0.80f, 0.59f);
style.Colors[ImGuiCol_ScrollbarGrabActive] = ImVec4(0.25f, 0.48f, 0.53f, 0.67f);
style.Colors[ImGuiCol_ComboBg] = ImVec4(0.89f, 0.98f, 1.00f, 0.99f);
style.Colors[ImGuiCol_CheckMark] = ImVec4(0.48f, 0.47f, 0.47f, 0.71f);
style.Colors[ImGuiCol_SliderGrabActive] = ImVec4(0.31f, 0.47f, 0.99f, 1.00f);
style.Colors[ImGuiCol_Button] = ImVec4(1.00f, 0.79f, 0.18f, 0.78f);
style.Colors[ImGuiCol_ButtonHovered] = ImVec4(0.42f, 0.82f, 1.00f, 0.81f);
style.Colors[ImGuiCol_ButtonActive] = ImVec4(0.72f, 1.00f, 1.00f, 0.86f);
style.Colors[ImGuiCol_Header] = ImVec4(0.65f, 0.78f, 0.84f, 0.80f);
style.Colors[ImGuiCol_HeaderHovered] = ImVec4(0.75f, 0.88f, 0.94f, 0.80f);
style.Colors[ImGuiCol_HeaderActive] = ImVec4(0.55f, 0.68f, 0.74f, 0.80f);//ImVec4(0.46f, 0.84f, 0.90f, 1.00f);
style.Colors[ImGuiCol_ResizeGrip] = ImVec4(0.60f, 0.60f, 0.80f, 0.30f);
style.Colors[ImGuiCol_ResizeGripHovered] = ImVec4(1.00f, 1.00f, 1.00f, 0.60f);
style.Colors[ImGuiCol_ResizeGripActive] = ImVec4(1.00f, 1.00f, 1.00f, 0.90f);
style.Colors[ImGuiCol_CloseButton] = ImVec4(0.41f, 0.75f, 0.98f, 0.50f);
style.Colors[ImGuiCol_CloseButtonHovered] = ImVec4(1.00f, 0.47f, 0.41f, 0.60f);
style.Colors[ImGuiCol_CloseButtonActive] = ImVec4(1.00f, 0.16f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TextSelectedBg] = ImVec4(1.00f, 0.99f, 0.54f, 0.43f);
style.Colors[ImGuiCol_TooltipBg] = ImVec4(0.82f, 0.92f, 1.00f, 0.90f);
style.Alpha = 1.0f;
style.WindowFillAlphaDefault = 1.0f;
style.FrameRounding = 4;
style.IndentSpacing = 12.0f;

Some minor tweaks to Doug's theme above

// Dark
ImVec4* colors = ImGui::GetStyle().Colors;
colors[ImGuiCol_Text]                   = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
colors[ImGuiCol_TextDisabled]           = ImVec4(0.40f, 0.40f, 0.40f, 1.00f);
colors[ImGuiCol_WindowBg]               = ImVec4(0.06f, 0.06f, 0.06f, 0.94f);
colors[ImGuiCol_Border]                 = ImVec4(1.00f, 1.00f, 1.00f, 0.19f);
colors[ImGuiCol_ChildWindowBg]          = ImVec4(1.00f, 1.00f, 1.00f, 0.00f);
colors[ImGuiCol_PopupBg]                = ImVec4(0.00f, 0.00f, 0.00f, 0.94f);
colors[ImGuiCol_FrameBg]                = ImVec4(0.16f, 0.29f, 0.48f, 0.54f);
colors[ImGuiCol_FrameBgHovered]         = ImVec4(0.26f, 0.59f, 0.98f, 0.40f);
colors[ImGuiCol_FrameBgActive]          = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
colors[ImGuiCol_TitleBg]                = ImVec4(0.04f, 0.04f, 0.04f, 1.00f);
colors[ImGuiCol_TitleBgCollapsed]       = ImVec4(0.00f, 0.00f, 0.00f, 0.51f);
colors[ImGuiCol_TitleBgActive]          = ImVec4(0.18f, 0.18f, 0.18f, 1.00f);
colors[ImGuiCol_MenuBarBg]              = ImVec4(0.14f, 0.14f, 0.14f, 1.00f);
colors[ImGuiCol_ScrollbarBg]            = ImVec4(0.02f, 0.02f, 0.02f, 0.53f);
colors[ImGuiCol_ScrollbarGrab]          = ImVec4(0.31f, 0.31f, 0.31f, 1.00f);
colors[ImGuiCol_ScrollbarGrabHovered]   = ImVec4(0.41f, 0.41f, 0.41f, 1.00f);
colors[ImGuiCol_ScrollbarGrabActive]    = ImVec4(0.51f, 0.51f, 0.51f, 1.00f);
colors[ImGuiCol_ComboBg]                = ImVec4(0.14f, 0.14f, 0.14f, 0.99f);
colors[ImGuiCol_CheckMark]              = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_SliderGrab]             = ImVec4(0.24f, 0.52f, 0.88f, 1.00f);
colors[ImGuiCol_SliderGrabActive]       = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_Button]                 = ImVec4(0.26f, 0.59f, 0.98f, 0.40f);
colors[ImGuiCol_ButtonHovered]          = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_ButtonActive]           = ImVec4(0.06f, 0.53f, 0.98f, 1.00f);
colors[ImGuiCol_Header]                 = ImVec4(0.26f, 0.59f, 0.98f, 0.31f);
colors[ImGuiCol_HeaderHovered]          = ImVec4(0.26f, 0.59f, 0.98f, 0.80f);
colors[ImGuiCol_HeaderActive]           = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_Separator]              = colors[ImGuiCol_Border];
colors[ImGuiCol_SeparatorHovered]       = ImVec4(0.26f, 0.59f, 0.98f, 0.78f);
colors[ImGuiCol_SeparatorActive]        = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_ResizeGrip]             = ImVec4(0.26f, 0.59f, 0.98f, 0.25f);
colors[ImGuiCol_ResizeGripHovered]      = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
colors[ImGuiCol_ResizeGripActive]       = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
colors[ImGuiCol_CloseButton]            = ImVec4(0.41f, 0.41f, 0.41f, 0.50f);
colors[ImGuiCol_CloseButtonHovered]     = ImVec4(0.98f, 0.39f, 0.36f, 1.00f);
colors[ImGuiCol_CloseButtonActive]      = ImVec4(0.98f, 0.39f, 0.36f, 1.00f);
colors[ImGuiCol_PlotLines]              = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
colors[ImGuiCol_PlotLinesHovered]       = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
colors[ImGuiCol_PlotHistogram]          = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
colors[ImGuiCol_PlotHistogramHovered]   = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
colors[ImGuiCol_TextSelectedBg]         = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
colors[ImGuiCol_ModalWindowDarkening]   = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);
#ifdef IMGUI_HAS_NAV
colors[ImGuiCol_NavHighlight]           = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_NavWindowingHighlight]  = ImVec4(1.00f, 1.00f, 1.00f, 0.12f);
#endif

Sorry for the styling not making much progress lately, will try to move forward with it in November.

I made some changes:

  1. The Classic theme has been reworked a little. In particular I have changed the buttons to use shades of blues instead of the redish-pink.

image

  1. Three functions have been added:
    StyleColorsClassic(), StyleColorsDark(), StyleColorsLight().
    Those themes will be maintained (and improved) in future updates and branches.

image

image

I will soon add a font selection combo - among loaded fonts, if only to suggest that fonts can be loaded. (Well as soon as I've figured out what to do with the 3rd parameters of the currently internal BeginCombo API.)

  1. The ImGuiWindowFlags_ShowBorders window flag has been completely killed.
    It makes using borders less of a headache.
    Instead there are new values style.WindowBorderSize, style.FrameBorderSize, style.PopupBorderSize, etc. The values are meant to be 0.0 and 1.0 but apart from performances and overlapping reasons it's actually possible to have thicker borders (depending on alpha setting it may not look good).
    The border are currently all the same colors, I will introduce more/better options as I rework the styling system but probably not for a few months (see ideas in #1223).

  2. The style editor now a) Offers to select among those three stock themes, b) Handle Saving/Revert a little better so you can see the Revert button when tweaking from a custom theme (instead of always compared to the default theme), c) Shows "simplified settings" at the top exposing FrameRounding and the different border sizes as checkboxes instead of float.

(Late to the party, but...)

Here is my theme, which (more or less) mimics Microsoft Design Guidelines (https://design.microsoft.com/):

image

ImGuiIO& io = ImGui::GetIO();
io.Fonts->Clear();
ImFont* font = io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
if (font != NULL) {
    io.FontDefault = font;
} else {
    io.Fonts->AddFontDefault();
}
io.Fonts->Build();

ImGuiStyle* style = &ImGui::GetStyle();
int hspacing = 8;
int vspacing = 6;
style->DisplaySafeAreaPadding = ImVec2(0, 0);
style->WindowPadding = ImVec2(hspacing/2, vspacing);
style->FramePadding = ImVec2(hspacing, vspacing);
style->ItemSpacing = ImVec2(hspacing, vspacing);
style->ItemInnerSpacing = ImVec2(hspacing, vspacing);
style->IndentSpacing = 20.0f;

style->WindowRounding = 0.0f;
style->FrameRounding = 0.0f;

style->WindowBorderSize = 0.0f;
style->FrameBorderSize = 1.0f;
style->PopupBorderSize = 1.0f;

style->ScrollbarSize = 20.0f;
style->ScrollbarRounding = 0.0f;
style->GrabMinSize = 5.0f;
style->GrabRounding = 0.0f;

ImVec4 white = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
ImVec4 transparent = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
ImVec4 dark = ImVec4(0.00f, 0.00f, 0.00f, 0.20f);
ImVec4 darker = ImVec4(0.00f, 0.00f, 0.00f, 0.50f);

ImVec4 background = ImVec4(0.95f, 0.95f, 0.95f, 1.00f);
ImVec4 text = ImVec4(0.10f, 0.10f, 0.10f, 1.00f);
ImVec4 border = ImVec4(0.60f, 0.60f, 0.60f, 1.00f);
ImVec4 grab = ImVec4(0.69f, 0.69f, 0.69f, 1.00f);
ImVec4 header = ImVec4(0.86f, 0.86f, 0.86f, 1.00f);
ImVec4 active = ImVec4(0.00f, 0.47f, 0.84f, 1.00f);
ImVec4 hover = ImVec4(0.00f, 0.47f, 0.84f, 0.20f);

style->Colors[ImGuiCol_Text] = text;
style->Colors[ImGuiCol_WindowBg] = background;
style->Colors[ImGuiCol_ChildBg] = background;
style->Colors[ImGuiCol_PopupBg] = white;

style->Colors[ImGuiCol_Border] = border;
style->Colors[ImGuiCol_BorderShadow] = transparent;

style->Colors[ImGuiCol_Button] = header;
style->Colors[ImGuiCol_ButtonHovered] = hover;
style->Colors[ImGuiCol_ButtonActive] = active;

style->Colors[ImGuiCol_FrameBg] = white;
style->Colors[ImGuiCol_FrameBgHovered] = hover;
style->Colors[ImGuiCol_FrameBgActive] = active;

style->Colors[ImGuiCol_MenuBarBg] = header;
style->Colors[ImGuiCol_Header] = header;
style->Colors[ImGuiCol_HeaderHovered] = hover;
style->Colors[ImGuiCol_HeaderActive] = active;

style->Colors[ImGuiCol_CheckMark] = text;
style->Colors[ImGuiCol_SliderGrab] = grab;
style->Colors[ImGuiCol_SliderGrabActive] = darker;

style->Colors[ImGuiCol_CloseButton] = transparent;
style->Colors[ImGuiCol_CloseButtonHovered] = transparent;
style->Colors[ImGuiCol_CloseButtonActive] = transparent;

style->Colors[ImGuiCol_ScrollbarBg] = header;
style->Colors[ImGuiCol_ScrollbarGrab] = grab;
style->Colors[ImGuiCol_ScrollbarGrabHovered] = dark;
style->Colors[ImGuiCol_ScrollbarGrabActive] = darker;

Here is my theme, which (more or less) mimics Microsoft Design Guidelines (https://design.microsoft.com/):

Thanks! Also that link and example are useful for #438.

Among the thing that are missing in the style system, this sort of style would benefit from improved borders (see e.g. #447). With those in and a few some extra color/style definitions, you style would pass better as a Microsoft thing.

Note that your font is too low, there's currently a vertical alignment issue that affect some fonts:
You may want to do:

ImFont* font = io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
font->DisplayOffset.y -= 1;

Note that your font is too low, there's currently a vertical alignment issue that affect some fonts:
You may want to do:

Yeah, it looks better now.

Thanks! Also that link and example are useful for #438.

For a direct link, also try this: https://docs.microsoft.com/en-us/windows/uwp/design/basics/commanding-basics

FYI, pushed a small change a few days ago to use a cross in the closing button instead of the infamous circle:

image
image

The highlight fill (which is circular to accommodate for rounded windows) is using the button background colors so ImGuiCol_CloseButton, ImGuiCol_CloseButtonActive, ImGuiCol_CloseButtonHovered have been completely removed (this is a breaking change), as part of simplifying styles.

I liked the them of "usernameiwantedwasalreadytaken" (your username is hard to write :-) )

So I think it would be grate to have dark and light themes for each of the platforms (win, Mac, android) that would help people who wants there app to be cross platform and native, because common users are not expected to lik e themes that don't fits the window the native os.

Thank you all for the effort, imgui is a greate library

@ocornut, I have a proposal.

I think ImGui themes should be readable from disk. And that there should be a handful of provided themes includes under misc/themes. The reason I think this is a good idea is that being able to easily share themes means that people are more like to create and fine tune new themes.

Would you support such a proposal in general? If yes I can send a pull request later this week. :)

@forrestthewoods IMHO I think it's really undesirable at the moment because the style system is really primitive and will change a lot this year. The only thing worse than a compile-time enum being changed/removed is having data stored on disk in a place that programmers can't necessarily track and in a format that will become obsolete. Data persistence is another layer of responsibility, and I think it is better we enforce this to stay programmer-side at the moment.

At the moment I would rather not encourage people to treat imgui as a skinnable library, especially considering how primitive and narrow the skinning is. When imgui is more mature/stable and the styling system allows for per-widget-type overrides, gradients, and we've nailed how to distribute style that works with SRGB-correct blending etc. we can design a more stable format.

(Note that for what you currently want to do, you roll your solution in a dozen of lines of code.)

It sounds like there is agreement that there should be a standalone style/theme file format at _some_ point. The question is not if, but when. I'm pretty happy with that and honestly could walk away content knowing it's coming at some point. And major style changes coming this year is a fair argument to wait! Taking time to discuss file format is an even better reason.

I would like to take a moment to throw out a few reasons as to why it should be done sooner rather than later. Not necessarily now, but sooner.

First, it encourages adoption. Right now you explicitly do NOT want that. Which I do understand. This is a chicken and egg problem. I think a file format will have to be adopted before the style system is ready for it. Because the style system can't be ready until it's been used. And it won't be used until it's easier to share. No battle plan survives first contact with the enemy; nor any file format. :)

Second, changes/extensions to the style format are always going to be breaking. Either things break at compile time due to enum removal. Or things "break" at run-time because something is default styled; due to either a new style value that has not been set or an old style value that changed. No matter how mature the styling system is these breaks are going to occur.

Third, the style system is primitive, but it's strong enough that a good color theme can result in a big improvement. I know we'd see more iteration on this if themes were easier to share.

My working implementation is a simple key/value file format. It works off sscanf in a way derived from the ini file format. Very simple. If the style format changes or is extended the end result will be style values having their default constructed value.

I think it is wise to wait until the first major set of style system improvements are made. But I do think it's important to enable shareable themes sooner rather than later. And I definitely think that enabling themes will help inform decisions made for the style system.

<3

Poor simulation on IntelliJ's Darcula theme:

auto *style = (dst ? dst : &ImGui::GetStyle());
style->WindowRounding = 5.3f;
style->GrabRounding = style->FrameRounding = 2.3f;
style->ScrollbarRounding = 5.0f;
style->FrameBorderSize = 1.0f;
style->ItemSpacing.y = 6.5f;

style->Colors[ImGuiCol_Text]                  = {0.73333335f, 0.73333335f, 0.73333335f, 1.00f};
style->Colors[ImGuiCol_TextDisabled]          = {0.34509805f, 0.34509805f, 0.34509805f, 1.00f};
style->Colors[ImGuiCol_WindowBg]              = {0.23529413f, 0.24705884f, 0.25490198f, 0.94f};
style->Colors[ImGuiCol_ChildBg]               = {0.23529413f, 0.24705884f, 0.25490198f, 0.00f};
style->Colors[ImGuiCol_PopupBg]               = {0.23529413f, 0.24705884f, 0.25490198f, 0.94f};
style->Colors[ImGuiCol_Border]                = {0.33333334f, 0.33333334f, 0.33333334f, 0.50f};
style->Colors[ImGuiCol_BorderShadow]          = {0.15686275f, 0.15686275f, 0.15686275f, 0.00f};
style->Colors[ImGuiCol_FrameBg]               = {0.16862746f, 0.16862746f, 0.16862746f, 0.54f};
style->Colors[ImGuiCol_FrameBgHovered]        = {0.453125f, 0.67578125f, 0.99609375f, 0.67f};
style->Colors[ImGuiCol_FrameBgActive]         = {0.47058827f, 0.47058827f, 0.47058827f, 0.67f};
style->Colors[ImGuiCol_TitleBg]               = {0.04f, 0.04f, 0.04f, 1.00f};
style->Colors[ImGuiCol_TitleBgCollapsed]      = {0.16f, 0.29f, 0.48f, 1.00f};
style->Colors[ImGuiCol_TitleBgActive]         = {0.00f, 0.00f, 0.00f, 0.51f};
style->Colors[ImGuiCol_MenuBarBg]             = {0.27058825f, 0.28627452f, 0.2901961f, 0.80f};
style->Colors[ImGuiCol_ScrollbarBg]           = {0.27058825f, 0.28627452f, 0.2901961f, 0.60f};
style->Colors[ImGuiCol_ScrollbarGrab]         = {0.21960786f, 0.30980393f, 0.41960788f, 0.51f};
style->Colors[ImGuiCol_ScrollbarGrabHovered]  = {0.21960786f, 0.30980393f, 0.41960788f, 1.00f};
style->Colors[ImGuiCol_ScrollbarGrabActive]   = {0.13725491f, 0.19215688f, 0.2627451f, 0.91f};
// style->Colors[ImGuiCol_ComboBg]               = {0.1f, 0.1f, 0.1f, 0.99f};
style->Colors[ImGuiCol_CheckMark]             = {0.90f, 0.90f, 0.90f, 0.83f};
style->Colors[ImGuiCol_SliderGrab]            = {0.70f, 0.70f, 0.70f, 0.62f};
style->Colors[ImGuiCol_SliderGrabActive]      = {0.30f, 0.30f, 0.30f, 0.84f};
style->Colors[ImGuiCol_Button]                = {0.33333334f, 0.3529412f, 0.36078432f, 0.49f};
style->Colors[ImGuiCol_ButtonHovered]         = {0.21960786f, 0.30980393f, 0.41960788f, 1.00f};
style->Colors[ImGuiCol_ButtonActive]          = {0.13725491f, 0.19215688f, 0.2627451f, 1.00f};
style->Colors[ImGuiCol_Header]                = {0.33333334f, 0.3529412f, 0.36078432f, 0.53f};
style->Colors[ImGuiCol_HeaderHovered]         = {0.453125f, 0.67578125f, 0.99609375f, 0.67f};
style->Colors[ImGuiCol_HeaderActive]          = {0.47058827f, 0.47058827f, 0.47058827f, 0.67f};
style->Colors[ImGuiCol_Separator]             = {0.31640625f, 0.31640625f, 0.31640625f, 1.00f};
style->Colors[ImGuiCol_SeparatorHovered]      = {0.31640625f, 0.31640625f, 0.31640625f, 1.00f};
style->Colors[ImGuiCol_SeparatorActive]       = {0.31640625f, 0.31640625f, 0.31640625f, 1.00f};
style->Colors[ImGuiCol_ResizeGrip]            = {1.00f, 1.00f, 1.00f, 0.85f};
style->Colors[ImGuiCol_ResizeGripHovered]     = {1.00f, 1.00f, 1.00f, 0.60f};
style->Colors[ImGuiCol_ResizeGripActive]      = {1.00f, 1.00f, 1.00f, 0.90f};
style->Colors[ImGuiCol_PlotLines]             = {0.61f, 0.61f, 0.61f, 1.00f};
style->Colors[ImGuiCol_PlotLinesHovered]      = {1.00f, 0.43f, 0.35f, 1.00f};
style->Colors[ImGuiCol_PlotHistogram]         = {0.90f, 0.70f, 0.00f, 1.00f};
style->Colors[ImGuiCol_PlotHistogramHovered]  = {1.00f, 0.60f, 0.00f, 1.00f};
style->Colors[ImGuiCol_TextSelectedBg]        = {0.18431373f, 0.39607847f, 0.79215693f, 0.90f};

@ice1000

Poor simulation on IntelliJ's Darcula theme:

Screenshot?

@ocornut

Screenshot?

image

  • Left: imgui with Darcula style
  • Right: IntelliJ IDEA with Darcula style

I'd like to make a theme proposal if possible, it is a grey/dark theme.
I wanted to make a theme similar to UE4 so this is what I came up with:
capture

Here is the code for it:

ImVec4* colors = ImGui::GetStyle().Colors;
colors[ImGuiCol_Text]                   = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
colors[ImGuiCol_TextDisabled]           = ImVec4(0.50f, 0.50f, 0.50f, 1.00f);
colors[ImGuiCol_WindowBg]               = ImVec4(0.06f, 0.06f, 0.06f, 0.94f);
colors[ImGuiCol_ChildBg]                = ImVec4(1.00f, 1.00f, 1.00f, 0.00f);
colors[ImGuiCol_PopupBg]                = ImVec4(0.08f, 0.08f, 0.08f, 0.94f);
colors[ImGuiCol_Border]                 = ImVec4(0.43f, 0.43f, 0.50f, 0.50f);
colors[ImGuiCol_BorderShadow]           = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_FrameBg]                = ImVec4(0.20f, 0.21f, 0.22f, 0.54f);
colors[ImGuiCol_FrameBgHovered]         = ImVec4(0.40f, 0.40f, 0.40f, 0.40f);
colors[ImGuiCol_FrameBgActive]          = ImVec4(0.18f, 0.18f, 0.18f, 0.67f);
colors[ImGuiCol_TitleBg]                = ImVec4(0.04f, 0.04f, 0.04f, 1.00f);
colors[ImGuiCol_TitleBgActive]          = ImVec4(0.29f, 0.29f, 0.29f, 1.00f);
colors[ImGuiCol_TitleBgCollapsed]       = ImVec4(0.00f, 0.00f, 0.00f, 0.51f);
colors[ImGuiCol_MenuBarBg]              = ImVec4(0.14f, 0.14f, 0.14f, 1.00f);
colors[ImGuiCol_ScrollbarBg]            = ImVec4(0.02f, 0.02f, 0.02f, 0.53f);
colors[ImGuiCol_ScrollbarGrab]          = ImVec4(0.31f, 0.31f, 0.31f, 1.00f);
colors[ImGuiCol_ScrollbarGrabHovered]   = ImVec4(0.41f, 0.41f, 0.41f, 1.00f);
colors[ImGuiCol_ScrollbarGrabActive]    = ImVec4(0.51f, 0.51f, 0.51f, 1.00f);
colors[ImGuiCol_CheckMark]              = ImVec4(0.94f, 0.94f, 0.94f, 1.00f);
colors[ImGuiCol_SliderGrab]             = ImVec4(0.51f, 0.51f, 0.51f, 1.00f);
colors[ImGuiCol_SliderGrabActive]       = ImVec4(0.86f, 0.86f, 0.86f, 1.00f);
colors[ImGuiCol_Button]                 = ImVec4(0.44f, 0.44f, 0.44f, 0.40f);
colors[ImGuiCol_ButtonHovered]          = ImVec4(0.46f, 0.47f, 0.48f, 1.00f);
colors[ImGuiCol_ButtonActive]           = ImVec4(0.42f, 0.42f, 0.42f, 1.00f);
colors[ImGuiCol_Header]                 = ImVec4(0.70f, 0.70f, 0.70f, 0.31f);
colors[ImGuiCol_HeaderHovered]          = ImVec4(0.70f, 0.70f, 0.70f, 0.80f);
colors[ImGuiCol_HeaderActive]           = ImVec4(0.48f, 0.50f, 0.52f, 1.00f);
colors[ImGuiCol_Separator]              = ImVec4(0.43f, 0.43f, 0.50f, 0.50f);
colors[ImGuiCol_SeparatorHovered]       = ImVec4(0.72f, 0.72f, 0.72f, 0.78f);
colors[ImGuiCol_SeparatorActive]        = ImVec4(0.51f, 0.51f, 0.51f, 1.00f);
colors[ImGuiCol_ResizeGrip]             = ImVec4(0.91f, 0.91f, 0.91f, 0.25f);
colors[ImGuiCol_ResizeGripHovered]      = ImVec4(0.81f, 0.81f, 0.81f, 0.67f);
colors[ImGuiCol_ResizeGripActive]       = ImVec4(0.46f, 0.46f, 0.46f, 0.95f);
colors[ImGuiCol_PlotLines]              = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
colors[ImGuiCol_PlotLinesHovered]       = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
colors[ImGuiCol_PlotHistogram]          = ImVec4(0.73f, 0.60f, 0.15f, 1.00f);
colors[ImGuiCol_PlotHistogramHovered]   = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
colors[ImGuiCol_TextSelectedBg]         = ImVec4(0.87f, 0.87f, 0.87f, 0.35f);
colors[ImGuiCol_ModalWindowDarkening]   = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);
colors[ImGuiCol_DragDropTarget]         = ImVec4(1.00f, 1.00f, 0.00f, 0.90f);
colors[ImGuiCol_NavHighlight]           = ImVec4(0.60f, 0.60f, 0.60f, 1.00f);
colors[ImGuiCol_NavWindowingHighlight]  = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);

I hope you like it and might even integrate it into ImGui.

A cherry theme :D

image

void CherryTheme() {
    // cherry colors, 3 intensities
    #define HI(v)   ImVec4(0.502f, 0.075f, 0.256f, v)
    #define MED(v)  ImVec4(0.455f, 0.198f, 0.301f, v)
    #define LOW(v)  ImVec4(0.232f, 0.201f, 0.271f, v)
    // backgrounds (@todo: complete with BG_MED, BG_LOW)
    #define BG(v)   ImVec4(0.200f, 0.220f, 0.270f, v)
    // text
    #define TEXT(v) ImVec4(0.860f, 0.930f, 0.890f, v)

    auto &style = ImGui::GetStyle();
    style.Colors[ImGuiCol_Text]                  = TEXT(0.78f);
    style.Colors[ImGuiCol_TextDisabled]          = TEXT(0.28f);
    style.Colors[ImGuiCol_WindowBg]              = ImVec4(0.13f, 0.14f, 0.17f, 1.00f);
    style.Colors[ImGuiCol_ChildWindowBg]         = BG( 0.58f);
    style.Colors[ImGuiCol_PopupBg]               = BG( 0.9f);
    style.Colors[ImGuiCol_Border]                = ImVec4(0.31f, 0.31f, 1.00f, 0.00f);
    style.Colors[ImGuiCol_BorderShadow]          = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
    style.Colors[ImGuiCol_FrameBg]               = BG( 1.00f);
    style.Colors[ImGuiCol_FrameBgHovered]        = MED( 0.78f);
    style.Colors[ImGuiCol_FrameBgActive]         = MED( 1.00f);
    style.Colors[ImGuiCol_TitleBg]               = LOW( 1.00f);
    style.Colors[ImGuiCol_TitleBgActive]         = HI( 1.00f);
    style.Colors[ImGuiCol_TitleBgCollapsed]      = BG( 0.75f);
    style.Colors[ImGuiCol_MenuBarBg]             = BG( 0.47f);
    style.Colors[ImGuiCol_ScrollbarBg]           = BG( 1.00f);
    style.Colors[ImGuiCol_ScrollbarGrab]         = ImVec4(0.09f, 0.15f, 0.16f, 1.00f);
    style.Colors[ImGuiCol_ScrollbarGrabHovered]  = MED( 0.78f);
    style.Colors[ImGuiCol_ScrollbarGrabActive]   = MED( 1.00f);
    style.Colors[ImGuiCol_CheckMark]             = ImVec4(0.71f, 0.22f, 0.27f, 1.00f);
    style.Colors[ImGuiCol_SliderGrab]            = ImVec4(0.47f, 0.77f, 0.83f, 0.14f);
    style.Colors[ImGuiCol_SliderGrabActive]      = ImVec4(0.71f, 0.22f, 0.27f, 1.00f);
    style.Colors[ImGuiCol_Button]                = ImVec4(0.47f, 0.77f, 0.83f, 0.14f);
    style.Colors[ImGuiCol_ButtonHovered]         = MED( 0.86f);
    style.Colors[ImGuiCol_ButtonActive]          = MED( 1.00f);
    style.Colors[ImGuiCol_Header]                = MED( 0.76f);
    style.Colors[ImGuiCol_HeaderHovered]         = MED( 0.86f);
    style.Colors[ImGuiCol_HeaderActive]          = HI( 1.00f);
    style.Colors[ImGuiCol_Column]                = ImVec4(0.14f, 0.16f, 0.19f, 1.00f);
    style.Colors[ImGuiCol_ColumnHovered]         = MED( 0.78f);
    style.Colors[ImGuiCol_ColumnActive]          = MED( 1.00f);
    style.Colors[ImGuiCol_ResizeGrip]            = ImVec4(0.47f, 0.77f, 0.83f, 0.04f);
    style.Colors[ImGuiCol_ResizeGripHovered]     = MED( 0.78f);
    style.Colors[ImGuiCol_ResizeGripActive]      = MED( 1.00f);
    style.Colors[ImGuiCol_PlotLines]             = TEXT(0.63f);
    style.Colors[ImGuiCol_PlotLinesHovered]      = MED( 1.00f);
    style.Colors[ImGuiCol_PlotHistogram]         = TEXT(0.63f);
    style.Colors[ImGuiCol_PlotHistogramHovered]  = MED( 1.00f);
    style.Colors[ImGuiCol_TextSelectedBg]        = MED( 0.43f);
    // [...]
    style.Colors[ImGuiCol_ModalWindowDarkening]  = BG( 0.73f);

    style.WindowPadding            = ImVec2(6, 4);
    style.WindowRounding           = 0.0f;
    style.FramePadding             = ImVec2(5, 2);
    style.FrameRounding            = 3.0f;
    style.ItemSpacing              = ImVec2(7, 1);
    style.ItemInnerSpacing         = ImVec2(1, 1);
    style.TouchExtraPadding        = ImVec2(0, 0);
    style.IndentSpacing            = 6.0f;
    style.ScrollbarSize            = 12.0f;
    style.ScrollbarRounding        = 16.0f;
    style.GrabMinSize              = 20.0f;
    style.GrabRounding             = 2.0f;

    style.WindowTitleAlign.x = 0.50f;

    style.Colors[ImGuiCol_Border] = ImVec4(0.539f, 0.479f, 0.255f, 0.162f);
    style.FrameBorderSize = 0.0f;
    style.WindowBorderSize = 1.0f;
}

dark theme
imgui

ImGuiStyle &st = ImGui::GetStyle();
st.FrameBorderSize = 1.0f;
st.FramePadding = ImVec2(4.0f,2.0f);
st.ItemSpacing = ImVec2(8.0f,2.0f);
st.WindowBorderSize = 1.0f;
st.TabBorderSize = 1.0f;
st.WindowRounding = 1.0f;
st.ChildRounding = 1.0f;
st.FrameRounding = 1.0f;
st.ScrollbarRounding = 1.0f;
st.GrabRounding = 1.0f;
st.TabRounding = 1.0f;

// Setup style
ImVec4* colors = ImGui::GetStyle().Colors;
colors[ImGuiCol_Text] = ImVec4(1.00f, 1.00f, 1.00f, 0.95f);
colors[ImGuiCol_TextDisabled] = ImVec4(0.50f, 0.50f, 0.50f, 1.00f);
colors[ImGuiCol_WindowBg] = ImVec4(0.13f, 0.12f, 0.12f, 1.00f);
colors[ImGuiCol_ChildBg] = ImVec4(1.00f, 1.00f, 1.00f, 0.00f);
colors[ImGuiCol_PopupBg] = ImVec4(0.05f, 0.05f, 0.05f, 0.94f);
colors[ImGuiCol_Border] = ImVec4(0.53f, 0.53f, 0.53f, 0.46f);
colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_FrameBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.85f);
colors[ImGuiCol_FrameBgHovered] = ImVec4(0.22f, 0.22f, 0.22f, 0.40f);
colors[ImGuiCol_FrameBgActive] = ImVec4(0.16f, 0.16f, 0.16f, 0.53f);
colors[ImGuiCol_TitleBg] = ImVec4(0.00f, 0.00f, 0.00f, 1.00f);
colors[ImGuiCol_TitleBgActive] = ImVec4(0.00f, 0.00f, 0.00f, 1.00f);
colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.00f, 0.00f, 0.00f, 0.51f);
colors[ImGuiCol_MenuBarBg] = ImVec4(0.12f, 0.12f, 0.12f, 1.00f);
colors[ImGuiCol_ScrollbarBg] = ImVec4(0.02f, 0.02f, 0.02f, 0.53f);
colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.31f, 0.31f, 0.31f, 1.00f);
colors[ImGuiCol_ScrollbarGrabHovered] = ImVec4(0.41f, 0.41f, 0.41f, 1.00f);
colors[ImGuiCol_ScrollbarGrabActive] = ImVec4(0.48f, 0.48f, 0.48f, 1.00f);
colors[ImGuiCol_CheckMark] = ImVec4(0.79f, 0.79f, 0.79f, 1.00f);
colors[ImGuiCol_SliderGrab] = ImVec4(0.48f, 0.47f, 0.47f, 0.91f);
colors[ImGuiCol_SliderGrabActive] = ImVec4(0.56f, 0.55f, 0.55f, 0.62f);
colors[ImGuiCol_Button] = ImVec4(0.50f, 0.50f, 0.50f, 0.63f);
colors[ImGuiCol_ButtonHovered] = ImVec4(0.67f, 0.67f, 0.68f, 0.63f);
colors[ImGuiCol_ButtonActive] = ImVec4(0.26f, 0.26f, 0.26f, 0.63f);
colors[ImGuiCol_Header] = ImVec4(0.54f, 0.54f, 0.54f, 0.58f);
colors[ImGuiCol_HeaderHovered] = ImVec4(0.64f, 0.65f, 0.65f, 0.80f);
colors[ImGuiCol_HeaderActive] = ImVec4(0.25f, 0.25f, 0.25f, 0.80f);
colors[ImGuiCol_Separator] = ImVec4(0.58f, 0.58f, 0.58f, 0.50f);
colors[ImGuiCol_SeparatorHovered] = ImVec4(0.81f, 0.81f, 0.81f, 0.64f);
colors[ImGuiCol_SeparatorActive] = ImVec4(0.81f, 0.81f, 0.81f, 0.64f);
colors[ImGuiCol_ResizeGrip] = ImVec4(0.87f, 0.87f, 0.87f, 0.53f);
colors[ImGuiCol_ResizeGripHovered] = ImVec4(0.87f, 0.87f, 0.87f, 0.74f);
colors[ImGuiCol_ResizeGripActive] = ImVec4(0.87f, 0.87f, 0.87f, 0.74f);
colors[ImGuiCol_Tab] = ImVec4(0.01f, 0.01f, 0.01f, 0.86f);
colors[ImGuiCol_TabHovered] = ImVec4(0.29f, 0.29f, 0.29f, 1.00f);
colors[ImGuiCol_TabActive] = ImVec4(0.31f, 0.31f, 0.31f, 1.00f);
colors[ImGuiCol_TabUnfocused] = ImVec4(0.02f, 0.02f, 0.02f, 1.00f);
colors[ImGuiCol_TabUnfocusedActive] = ImVec4(0.19f, 0.19f, 0.19f, 1.00f);
colors[ImGuiCol_DockingPreview] = ImVec4(0.38f, 0.48f, 0.60f, 1.00f);
colors[ImGuiCol_DockingEmptyBg] = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
colors[ImGuiCol_PlotLines] = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
colors[ImGuiCol_PlotLinesHovered] = ImVec4(0.68f, 0.68f, 0.68f, 1.00f);
colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.77f, 0.33f, 1.00f);
colors[ImGuiCol_PlotHistogramHovered] = ImVec4(0.87f, 0.55f, 0.08f, 1.00f);
colors[ImGuiCol_TextSelectedBg] = ImVec4(0.47f, 0.60f, 0.76f, 0.47f);
colors[ImGuiCol_DragDropTarget] = ImVec4(0.58f, 0.58f, 0.58f, 0.90f);
colors[ImGuiCol_NavHighlight] = ImVec4(0.60f, 0.60f, 0.60f, 1.00f);
colors[ImGuiCol_NavWindowingHighlight] = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);

@r-lyeh Nice theme. However the character in a button is not properly centered, it's slightly off? For example in the InputInt.

I dont see any problems :D care to highlight the misalignment? thx :D
Edit: Ok, thx! I've fixed the original snippet.

unaligned

It's a bit 'ant-fucking' but as you can see the '-' and '+' are not in the center of the button

Copying LightGreen style from @ebachard posted in #1776 (so I can close the other topic for now).
capture du 2018-04-26 20-42-40

// generic miniDart theme
void ImGui::StyleColorsLightGreen(ImGuiStyle* dst)
{
    ImGuiStyle* style = dst ? dst : &ImGui::GetStyle();
    ImVec4* colors = style->Colors;

    style->WindowRounding    = 2.0f;             // Radius of window corners rounding. Set to 0.0f to have rectangular windows
    style->ScrollbarRounding = 3.0f;             // Radius of grab corners rounding for scrollbar
    style->GrabRounding      = 2.0f;             // Radius of grabs corners rounding. Set to 0.0f to have rectangular slider grabs.
    style->AntiAliasedLines  = true;
    style->AntiAliasedFill   = true;
    style->WindowRounding    = 2;
    style->ChildRounding     = 2;
    style->ScrollbarSize     = 16;
    style->ScrollbarRounding = 3;
    style->GrabRounding      = 2;
    style->ItemSpacing.x     = 10;
    style->ItemSpacing.y     = 4;
    style->IndentSpacing     = 22;
    style->FramePadding.x    = 6;
    style->FramePadding.y    = 4;
    style->Alpha             = 1.0f;
    style->FrameRounding     = 3.0f;

    colors[ImGuiCol_Text]                   = ImVec4(0.00f, 0.00f, 0.00f, 1.00f);
    colors[ImGuiCol_TextDisabled]          = ImVec4(0.60f, 0.60f, 0.60f, 1.00f);
    colors[ImGuiCol_WindowBg]              = ImVec4(0.86f, 0.86f, 0.86f, 1.00f);
    //colors[ImGuiCol_ChildWindowBg]         = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
    colors[ImGuiCol_ChildBg]                = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
    colors[ImGuiCol_PopupBg]                = ImVec4(0.93f, 0.93f, 0.93f, 0.98f);
    colors[ImGuiCol_Border]                = ImVec4(0.71f, 0.71f, 0.71f, 0.08f);
    colors[ImGuiCol_BorderShadow]          = ImVec4(0.00f, 0.00f, 0.00f, 0.04f);
    colors[ImGuiCol_FrameBg]               = ImVec4(0.71f, 0.71f, 0.71f, 0.55f);
    colors[ImGuiCol_FrameBgHovered]        = ImVec4(0.94f, 0.94f, 0.94f, 0.55f);
    colors[ImGuiCol_FrameBgActive]         = ImVec4(0.71f, 0.78f, 0.69f, 0.98f);
    colors[ImGuiCol_TitleBg]               = ImVec4(0.85f, 0.85f, 0.85f, 1.00f);
    colors[ImGuiCol_TitleBgCollapsed]      = ImVec4(0.82f, 0.78f, 0.78f, 0.51f);
    colors[ImGuiCol_TitleBgActive]         = ImVec4(0.78f, 0.78f, 0.78f, 1.00f);
    colors[ImGuiCol_MenuBarBg]             = ImVec4(0.86f, 0.86f, 0.86f, 1.00f);
    colors[ImGuiCol_ScrollbarBg]           = ImVec4(0.20f, 0.25f, 0.30f, 0.61f);
    colors[ImGuiCol_ScrollbarGrab]         = ImVec4(0.90f, 0.90f, 0.90f, 0.30f);
    colors[ImGuiCol_ScrollbarGrabHovered]  = ImVec4(0.92f, 0.92f, 0.92f, 0.78f);
    colors[ImGuiCol_ScrollbarGrabActive]   = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
    colors[ImGuiCol_CheckMark]             = ImVec4(0.184f, 0.407f, 0.193f, 1.00f);
    colors[ImGuiCol_SliderGrab]            = ImVec4(0.26f, 0.59f, 0.98f, 0.78f);
    colors[ImGuiCol_SliderGrabActive]      = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
    colors[ImGuiCol_Button]                = ImVec4(0.71f, 0.78f, 0.69f, 0.40f);
    colors[ImGuiCol_ButtonHovered]         = ImVec4(0.725f, 0.805f, 0.702f, 1.00f);
    colors[ImGuiCol_ButtonActive]          = ImVec4(0.793f, 0.900f, 0.836f, 1.00f);
    colors[ImGuiCol_Header]                = ImVec4(0.71f, 0.78f, 0.69f, 0.31f);
    colors[ImGuiCol_HeaderHovered]         = ImVec4(0.71f, 0.78f, 0.69f, 0.80f);
    colors[ImGuiCol_HeaderActive]          = ImVec4(0.71f, 0.78f, 0.69f, 1.00f);
    colors[ImGuiCol_Column]                = ImVec4(0.39f, 0.39f, 0.39f, 1.00f);
    colors[ImGuiCol_ColumnHovered]         = ImVec4(0.26f, 0.59f, 0.98f, 0.78f);
    colors[ImGuiCol_ColumnActive]          = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
    colors[ImGuiCol_Separator]              = ImVec4(0.39f, 0.39f, 0.39f, 1.00f);
    colors[ImGuiCol_SeparatorHovered]       = ImVec4(0.14f, 0.44f, 0.80f, 0.78f);
    colors[ImGuiCol_SeparatorActive]        = ImVec4(0.14f, 0.44f, 0.80f, 1.00f);
    colors[ImGuiCol_ResizeGrip]            = ImVec4(1.00f, 1.00f, 1.00f, 0.00f);
    colors[ImGuiCol_ResizeGripHovered]     = ImVec4(0.26f, 0.59f, 0.98f, 0.45f);
    colors[ImGuiCol_ResizeGripActive]      = ImVec4(0.26f, 0.59f, 0.98f, 0.78f);
    colors[ImGuiCol_PlotLines]             = ImVec4(0.39f, 0.39f, 0.39f, 1.00f);
    colors[ImGuiCol_PlotLinesHovered]      = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
    colors[ImGuiCol_PlotHistogram]         = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
    colors[ImGuiCol_PlotHistogramHovered]  = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
    colors[ImGuiCol_TextSelectedBg]        = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
    colors[ImGuiCol_ModalWindowDarkening]  = ImVec4(0.20f, 0.20f, 0.20f, 0.35f);
    colors[ImGuiCol_DragDropTarget]         = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
    colors[ImGuiCol_NavHighlight]           = colors[ImGuiCol_HeaderHovered];
    colors[ImGuiCol_NavWindowingHighlight]  = ImVec4(0.70f, 0.70f, 0.70f, 0.70f);
}

@ocornut : thanks a lot ! For the one who want to test some ImGui themes, there is a french version of miniDart available for Windows (apologies, I'm not a pro, and only 40% of the UI is currently translated).

Dependencies are:

  • OpenGL drivers
  • a connected webcam (Logitech preferred, as explained on the repo)

The available themes (look at "Préférences" tab), are:

  • Lightgreen
  • Dark
  • Classic
  • Light Blue
  • Windows (default)

You need a connected webcam to start (I'll change that very soon).

Please be gentle : I'm not a pro ;-)

The link : https://framagit.org/ericb/miniDart

My theme was inspired by Photoshop's UI. Dark charcoal colors are used so that the UI is not commanding your attention all the time and I use orange accents here and there when interacting with some things such as the window resize handle or divider to add a bit of color that stays out of the way when you are working.

Image of Derydoca Engine

void DearImgui::ApplyDefaultStyle()
{
    ImGuiStyle* style = &ImGui::GetStyle();
    ImVec4* colors = style->Colors;

    colors[ImGuiCol_Text]                   = ImVec4(1.000f, 1.000f, 1.000f, 1.000f);
    colors[ImGuiCol_TextDisabled]           = ImVec4(0.500f, 0.500f, 0.500f, 1.000f);
    colors[ImGuiCol_WindowBg]               = ImVec4(0.180f, 0.180f, 0.180f, 1.000f);
    colors[ImGuiCol_ChildBg]                = ImVec4(0.280f, 0.280f, 0.280f, 0.000f);
    colors[ImGuiCol_PopupBg]                = ImVec4(0.313f, 0.313f, 0.313f, 1.000f);
    colors[ImGuiCol_Border]                 = ImVec4(0.266f, 0.266f, 0.266f, 1.000f);
    colors[ImGuiCol_BorderShadow]           = ImVec4(0.000f, 0.000f, 0.000f, 0.000f);
    colors[ImGuiCol_FrameBg]                = ImVec4(0.160f, 0.160f, 0.160f, 1.000f);
    colors[ImGuiCol_FrameBgHovered]         = ImVec4(0.200f, 0.200f, 0.200f, 1.000f);
    colors[ImGuiCol_FrameBgActive]          = ImVec4(0.280f, 0.280f, 0.280f, 1.000f);
    colors[ImGuiCol_TitleBg]                = ImVec4(0.148f, 0.148f, 0.148f, 1.000f);
    colors[ImGuiCol_TitleBgActive]          = ImVec4(0.148f, 0.148f, 0.148f, 1.000f);
    colors[ImGuiCol_TitleBgCollapsed]       = ImVec4(0.148f, 0.148f, 0.148f, 1.000f);
    colors[ImGuiCol_MenuBarBg]              = ImVec4(0.195f, 0.195f, 0.195f, 1.000f);
    colors[ImGuiCol_ScrollbarBg]            = ImVec4(0.160f, 0.160f, 0.160f, 1.000f);
    colors[ImGuiCol_ScrollbarGrab]          = ImVec4(0.277f, 0.277f, 0.277f, 1.000f);
    colors[ImGuiCol_ScrollbarGrabHovered]   = ImVec4(0.300f, 0.300f, 0.300f, 1.000f);
    colors[ImGuiCol_ScrollbarGrabActive]    = ImVec4(1.000f, 0.391f, 0.000f, 1.000f);
    colors[ImGuiCol_CheckMark]              = ImVec4(1.000f, 1.000f, 1.000f, 1.000f);
    colors[ImGuiCol_SliderGrab]             = ImVec4(0.391f, 0.391f, 0.391f, 1.000f);
    colors[ImGuiCol_SliderGrabActive]       = ImVec4(1.000f, 0.391f, 0.000f, 1.000f);
    colors[ImGuiCol_Button]                 = ImVec4(1.000f, 1.000f, 1.000f, 0.000f);
    colors[ImGuiCol_ButtonHovered]          = ImVec4(1.000f, 1.000f, 1.000f, 0.156f);
    colors[ImGuiCol_ButtonActive]           = ImVec4(1.000f, 1.000f, 1.000f, 0.391f);
    colors[ImGuiCol_Header]                 = ImVec4(0.313f, 0.313f, 0.313f, 1.000f);
    colors[ImGuiCol_HeaderHovered]          = ImVec4(0.469f, 0.469f, 0.469f, 1.000f);
    colors[ImGuiCol_HeaderActive]           = ImVec4(0.469f, 0.469f, 0.469f, 1.000f);
    colors[ImGuiCol_Separator]              = colors[ImGuiCol_Border];
    colors[ImGuiCol_SeparatorHovered]       = ImVec4(0.391f, 0.391f, 0.391f, 1.000f);
    colors[ImGuiCol_SeparatorActive]        = ImVec4(1.000f, 0.391f, 0.000f, 1.000f);
    colors[ImGuiCol_ResizeGrip]             = ImVec4(1.000f, 1.000f, 1.000f, 0.250f);
    colors[ImGuiCol_ResizeGripHovered]      = ImVec4(1.000f, 1.000f, 1.000f, 0.670f);
    colors[ImGuiCol_ResizeGripActive]       = ImVec4(1.000f, 0.391f, 0.000f, 1.000f);
    colors[ImGuiCol_Tab]                    = ImVec4(0.098f, 0.098f, 0.098f, 1.000f);
    colors[ImGuiCol_TabHovered]             = ImVec4(0.352f, 0.352f, 0.352f, 1.000f);
    colors[ImGuiCol_TabActive]              = ImVec4(0.195f, 0.195f, 0.195f, 1.000f);
    colors[ImGuiCol_TabUnfocused]           = ImVec4(0.098f, 0.098f, 0.098f, 1.000f);
    colors[ImGuiCol_TabUnfocusedActive]     = ImVec4(0.195f, 0.195f, 0.195f, 1.000f);
    colors[ImGuiCol_DockingPreview]         = ImVec4(1.000f, 0.391f, 0.000f, 0.781f);
    colors[ImGuiCol_DockingEmptyBg]         = ImVec4(0.180f, 0.180f, 0.180f, 1.000f);
    colors[ImGuiCol_PlotLines]              = ImVec4(0.469f, 0.469f, 0.469f, 1.000f);
    colors[ImGuiCol_PlotLinesHovered]       = ImVec4(1.000f, 0.391f, 0.000f, 1.000f);
    colors[ImGuiCol_PlotHistogram]          = ImVec4(0.586f, 0.586f, 0.586f, 1.000f);
    colors[ImGuiCol_PlotHistogramHovered]   = ImVec4(1.000f, 0.391f, 0.000f, 1.000f);
    colors[ImGuiCol_TextSelectedBg]         = ImVec4(1.000f, 1.000f, 1.000f, 0.156f);
    colors[ImGuiCol_DragDropTarget]         = ImVec4(1.000f, 0.391f, 0.000f, 1.000f);
    colors[ImGuiCol_NavHighlight]           = ImVec4(1.000f, 0.391f, 0.000f, 1.000f);
    colors[ImGuiCol_NavWindowingHighlight]  = ImVec4(1.000f, 0.391f, 0.000f, 1.000f);
    colors[ImGuiCol_NavWindowingDimBg]      = ImVec4(0.000f, 0.000f, 0.000f, 0.586f);
    colors[ImGuiCol_ModalWindowDimBg]       = ImVec4(0.000f, 0.000f, 0.000f, 0.586f);

    style->ChildRounding = 4.0f;
    style->FrameBorderSize = 1.0f;
    style->FrameRounding = 2.0f;
    style->GrabMinSize = 7.0f;
    style->PopupRounding = 2.0f;
    style->ScrollbarRounding = 12.0f;
    style->ScrollbarSize = 13.0f;
    style->TabBorderSize = 1.0f;
    style->TabRounding = 0.0f;
    style->WindowRounding = 4.0f;
}

I call the theme "CorporateGrey". The colors and styling parameters are aimed at being clean and easy on the eyes, and fit a little better for desktop applications/suites.

greyflat
greyframed

inline void Style()
{
    ImGuiStyle & style = ImGui::GetStyle();
    ImVec4 * colors = style.Colors;

    /// 0 = FLAT APPEARENCE
    /// 1 = MORE "3D" LOOK
    int is3D = 0;

    colors[ImGuiCol_Text]                   = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
    colors[ImGuiCol_TextDisabled]           = ImVec4(0.40f, 0.40f, 0.40f, 1.00f);
    colors[ImGuiCol_ChildBg]                = ImVec4(0.25f, 0.25f, 0.25f, 1.00f);
    colors[ImGuiCol_WindowBg]               = ImVec4(0.25f, 0.25f, 0.25f, 1.00f);
    colors[ImGuiCol_PopupBg]                = ImVec4(0.25f, 0.25f, 0.25f, 1.00f);
    colors[ImGuiCol_Border]                 = ImVec4(0.12f, 0.12f, 0.12f, 0.71f);
    colors[ImGuiCol_BorderShadow]           = ImVec4(1.00f, 1.00f, 1.00f, 0.06f);
    colors[ImGuiCol_FrameBg]                = ImVec4(0.42f, 0.42f, 0.42f, 0.54f);
    colors[ImGuiCol_FrameBgHovered]         = ImVec4(0.42f, 0.42f, 0.42f, 0.40f);
    colors[ImGuiCol_FrameBgActive]          = ImVec4(0.56f, 0.56f, 0.56f, 0.67f);
    colors[ImGuiCol_TitleBg]                = ImVec4(0.19f, 0.19f, 0.19f, 1.00f);
    colors[ImGuiCol_TitleBgActive]          = ImVec4(0.22f, 0.22f, 0.22f, 1.00f);
    colors[ImGuiCol_TitleBgCollapsed]       = ImVec4(0.17f, 0.17f, 0.17f, 0.90f);
    colors[ImGuiCol_MenuBarBg]              = ImVec4(0.335f, 0.335f, 0.335f, 1.000f);
    colors[ImGuiCol_ScrollbarBg]            = ImVec4(0.24f, 0.24f, 0.24f, 0.53f);
    colors[ImGuiCol_ScrollbarGrab]          = ImVec4(0.41f, 0.41f, 0.41f, 1.00f);
    colors[ImGuiCol_ScrollbarGrabHovered]   = ImVec4(0.52f, 0.52f, 0.52f, 1.00f);
    colors[ImGuiCol_ScrollbarGrabActive]    = ImVec4(0.76f, 0.76f, 0.76f, 1.00f);
    colors[ImGuiCol_CheckMark]              = ImVec4(0.65f, 0.65f, 0.65f, 1.00f);
    colors[ImGuiCol_SliderGrab]             = ImVec4(0.52f, 0.52f, 0.52f, 1.00f);
    colors[ImGuiCol_SliderGrabActive]       = ImVec4(0.64f, 0.64f, 0.64f, 1.00f);
    colors[ImGuiCol_Button]                 = ImVec4(0.54f, 0.54f, 0.54f, 0.35f);
    colors[ImGuiCol_ButtonHovered]          = ImVec4(0.52f, 0.52f, 0.52f, 0.59f);
    colors[ImGuiCol_ButtonActive]           = ImVec4(0.76f, 0.76f, 0.76f, 1.00f);
    colors[ImGuiCol_Header]                 = ImVec4(0.38f, 0.38f, 0.38f, 1.00f);
    colors[ImGuiCol_HeaderHovered]          = ImVec4(0.47f, 0.47f, 0.47f, 1.00f);
    colors[ImGuiCol_HeaderActive]           = ImVec4(0.76f, 0.76f, 0.76f, 0.77f);
    colors[ImGuiCol_Separator]              = ImVec4(0.000f, 0.000f, 0.000f, 0.137f);
    colors[ImGuiCol_SeparatorHovered]       = ImVec4(0.700f, 0.671f, 0.600f, 0.290f);
    colors[ImGuiCol_SeparatorActive]        = ImVec4(0.702f, 0.671f, 0.600f, 0.674f);
    colors[ImGuiCol_ResizeGrip]             = ImVec4(0.26f, 0.59f, 0.98f, 0.25f);
    colors[ImGuiCol_ResizeGripHovered]      = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
    colors[ImGuiCol_ResizeGripActive]       = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
    colors[ImGuiCol_PlotLines]              = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
    colors[ImGuiCol_PlotLinesHovered]       = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
    colors[ImGuiCol_PlotHistogram]          = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
    colors[ImGuiCol_PlotHistogramHovered]   = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
    colors[ImGuiCol_TextSelectedBg]         = ImVec4(0.73f, 0.73f, 0.73f, 0.35f);
    colors[ImGuiCol_ModalWindowDimBg]       = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);
    colors[ImGuiCol_DragDropTarget]         = ImVec4(1.00f, 1.00f, 0.00f, 0.90f);
    colors[ImGuiCol_NavHighlight]           = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
    colors[ImGuiCol_NavWindowingHighlight]  = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
    colors[ImGuiCol_NavWindowingDimBg]      = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);

    style.PopupRounding = 3;

    style.WindowPadding = ImVec2(4, 4);
    style.FramePadding  = ImVec2(6, 4);
    style.ItemSpacing   = ImVec2(6, 2);

    style.ScrollbarSize = 18;

    style.WindowBorderSize = 1;
    style.ChildBorderSize  = 1;
    style.PopupBorderSize  = 1;
    style.FrameBorderSize  = is3D; 

    style.WindowRounding    = 3;
    style.ChildRounding     = 3;
    style.FrameRounding     = 3;
    style.ScrollbarRounding = 2;
    style.GrabRounding      = 3;

    #ifdef IMGUI_HAS_DOCK 
        style.TabBorderSize = is3D; 
        style.TabRounding   = 3;

        colors[ImGuiCol_DockingEmptyBg]     = ImVec4(0.38f, 0.38f, 0.38f, 1.00f);
        colors[ImGuiCol_Tab]                = ImVec4(0.25f, 0.25f, 0.25f, 1.00f);
        colors[ImGuiCol_TabHovered]         = ImVec4(0.40f, 0.40f, 0.40f, 1.00f);
        colors[ImGuiCol_TabActive]          = ImVec4(0.33f, 0.33f, 0.33f, 1.00f);
        colors[ImGuiCol_TabUnfocused]       = ImVec4(0.25f, 0.25f, 0.25f, 1.00f);
        colors[ImGuiCol_TabUnfocusedActive] = ImVec4(0.33f, 0.33f, 0.33f, 1.00f);
        colors[ImGuiCol_DockingPreview]     = ImVec4(0.85f, 0.85f, 0.85f, 0.28f);

        if (ImGui::GetIO().ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
        {
            style.WindowRounding = 0.0f;
            style.Colors[ImGuiCol_WindowBg].w = 1.0f;
        }
    #endif
}

Had fun playing with ImGui colors today for a personal project.
I ended up making a small class to set a theme from 5 basic colors you can provide.

Edit : forgot to mention that this is for the imgui Docking branch.

so, for instance, by default, I am using these colors as input: https://coolors.co/252131-f4f1de-da115e-792359-c7ef00

calling EditorColorScheme::ApplyTheme();, I get :
Default

Or with a different color set
// From https://coolors.co/1f2421-725ac1-8d86c9-eca400-dce1de ; EditorColorScheme::SetColors(0x1F2421FF /* Background */, 0xDCE1DEFF /* Text */, 0x725AC1FF /* MainColor */, 0x8D86C9FF /* MainAccent */, 0xECA400FF /* Highlight */ );

i get :
Dark Purple

or
// From : https://coolors.co/c7dfc5-dbdddb-bbddb8-373737-9b287b ; EditorColorScheme::SetColors(0xC7DFC5FF, 0x373737FF, 0x86A586FF, 0xBBDDB8FF, 0x9B287BFF);

Greenpastel

Class is here, if anyone wants to play with it :
`
class EditorColorScheme
{
// 0xRRGGBBAA
inline static int BackGroundColor = 0x25213100;
inline static int TextColor = 0xF4F1DE00;
inline static int MainColor = 0xDA115E00;
inline static int MainAccentColor = 0x79235900;
inline static int HighlightColor = 0xC7EF0000;

    inline static int Black             = 0x00000000;
    inline static int White             = 0xFFFFFF00;

    inline static int AlphaTransparent  = 0x00;
    inline static int Alpha20           = 0x33;
    inline static int Alpha40           = 0x66;
    inline static int Alpha50           = 0x80;
    inline static int Alpha60           = 0x99;
    inline static int Alpha80           = 0xCC;
    inline static int Alpha90           = 0xE6;
    inline static int AlphaFull         = 0xFF;

    static float GetR(int colorCode) { return (float)((colorCode & 0xFF000000) >> 24 ) / (float)(0xFF); }
    static float GetG(int colorCode) { return (float)((colorCode & 0x00FF0000) >> 16 ) / (float)(0xFF); }
    static float GetB(int colorCode) { return (float)((colorCode & 0x0000FF00) >> 8  ) / (float)(0xFF); }
    static float GetA(int alphaCode) { return ((float)alphaCode / (float)0xFF); }

    static ImVec4 GetColor(int c, int a = Alpha80)  { return ImVec4(GetR(c), GetG(c), GetB(c), GetA(a)); }
    static ImVec4 Darken(ImVec4 c, float p)         { return ImVec4(fmax(0.f, c.x - 1.0f * p), fmax(0.f, c.y - 1.0f * p), fmax(0.f, c.z - 1.0f *p), c.w); }
    static ImVec4 Lighten(ImVec4 c, float p)        { return ImVec4(fmax(0.f, c.x + 1.0f * p), fmax(0.f, c.y + 1.0f * p), fmax(0.f, c.z + 1.0f *p), c.w); }

    static ImVec4 Disabled(ImVec4 c)    {   return Darken(c, 0.6f);     }       
    static ImVec4 Hovered(ImVec4 c)     {   return Lighten(c, 0.2f);    }
    static ImVec4 Active(ImVec4 c)      {   return Lighten(ImVec4(c.x, c.y, c.z, 1.0f),0.1f); }
    static ImVec4 Collapsed(ImVec4 c)   {   return Darken(c, 0.2f);     }

public:

    static void SetColors(int backGroundColor, int textColor, int mainColor, int mainAccentColor, int highlightColor)
    {
        BackGroundColor = backGroundColor;
        TextColor = textColor;
        MainColor = mainColor;
        MainAccentColor = mainAccentColor;
        HighlightColor = highlightColor;
    }

    static void ApplyTheme()
    {
        ImVec4* colors = ImGui::GetStyle().Colors;

        colors[ImGuiCol_Text]                   = GetColor(TextColor);
        colors[ImGuiCol_TextDisabled]           = Disabled(colors[ImGuiCol_Text]);
        colors[ImGuiCol_WindowBg]               = GetColor(BackGroundColor);
        colors[ImGuiCol_ChildBg]                = GetColor(Black, Alpha20);
        colors[ImGuiCol_PopupBg]                = GetColor(BackGroundColor, Alpha90);
        colors[ImGuiCol_Border]                 = Lighten(GetColor(BackGroundColor),0.4f);
        colors[ImGuiCol_BorderShadow]           = GetColor(Black);
        colors[ImGuiCol_FrameBg]                = GetColor(MainAccentColor, Alpha40);
        colors[ImGuiCol_FrameBgHovered]         = Hovered(colors[ImGuiCol_FrameBg]);
        colors[ImGuiCol_FrameBgActive]          = Active(colors[ImGuiCol_FrameBg]);
        colors[ImGuiCol_TitleBg]                = GetColor(BackGroundColor, Alpha80);
        colors[ImGuiCol_TitleBgActive]          = Active(colors[ImGuiCol_TitleBg]);
        colors[ImGuiCol_TitleBgCollapsed]       = Collapsed(colors[ImGuiCol_TitleBg]);
        colors[ImGuiCol_MenuBarBg]              = Darken(GetColor(BackGroundColor), 0.2f);
        colors[ImGuiCol_ScrollbarBg]            = Lighten(GetColor(BackGroundColor, Alpha50), 0.4f);
        colors[ImGuiCol_ScrollbarGrab]          = Lighten(GetColor(BackGroundColor), 0.3f);
        colors[ImGuiCol_ScrollbarGrabHovered]   = Hovered(colors[ImGuiCol_ScrollbarGrab]);
        colors[ImGuiCol_ScrollbarGrabActive]    = Active(colors[ImGuiCol_ScrollbarGrab]);
        colors[ImGuiCol_CheckMark]              = GetColor(HighlightColor);
        colors[ImGuiCol_SliderGrab]             = GetColor(HighlightColor);
        colors[ImGuiCol_SliderGrabActive]       = Active(colors[ImGuiCol_SliderGrab]);
        colors[ImGuiCol_Button]                 = GetColor(MainColor, Alpha80);
        colors[ImGuiCol_ButtonHovered]          = Hovered(colors[ImGuiCol_Button]);
        colors[ImGuiCol_ButtonActive]           = Active(colors[ImGuiCol_Button]);
        colors[ImGuiCol_Header]                 = GetColor(MainAccentColor, Alpha80);
        colors[ImGuiCol_HeaderHovered]          = Hovered(colors[ImGuiCol_Header]);
        colors[ImGuiCol_HeaderActive]           = Active(colors[ImGuiCol_Header]);
        colors[ImGuiCol_Separator]              = colors[ImGuiCol_Border];
        colors[ImGuiCol_SeparatorHovered]       = Hovered(colors[ImGuiCol_Separator]);
        colors[ImGuiCol_SeparatorActive]        = Active(colors[ImGuiCol_Separator]);
        colors[ImGuiCol_ResizeGrip]             = GetColor(MainColor, Alpha20);
        colors[ImGuiCol_ResizeGripHovered]      = Hovered(colors[ImGuiCol_ResizeGrip]);
        colors[ImGuiCol_ResizeGripActive]       = Active(colors[ImGuiCol_ResizeGrip]);
        colors[ImGuiCol_Tab]                    = GetColor(MainColor, Alpha60);
        colors[ImGuiCol_TabHovered]             = Hovered(colors[ImGuiCol_Tab]);
        colors[ImGuiCol_TabActive]              = Active(colors[ImGuiCol_Tab]);
        colors[ImGuiCol_TabUnfocused]           = colors[ImGuiCol_Tab];
        colors[ImGuiCol_TabUnfocusedActive]     = colors[ImGuiCol_TabActive];
        colors[ImGuiCol_DockingPreview]         = Darken(colors[ImGuiCol_HeaderActive], 0.2f);
        colors[ImGuiCol_DockingEmptyBg]         = Darken(colors[ImGuiCol_HeaderActive], 0.6f);
        colors[ImGuiCol_PlotLines]              = GetColor(HighlightColor);
        colors[ImGuiCol_PlotLinesHovered]       = Hovered(colors[ImGuiCol_PlotLines]);
        colors[ImGuiCol_PlotHistogram]          = GetColor(HighlightColor);
        colors[ImGuiCol_PlotHistogramHovered]   = Hovered(colors[ImGuiCol_PlotHistogram]);
        colors[ImGuiCol_TextSelectedBg]         = GetColor(HighlightColor, Alpha40);
        colors[ImGuiCol_DragDropTarget]         = GetColor(HighlightColor, Alpha80);;
        colors[ImGuiCol_NavHighlight]           = GetColor(White);
        colors[ImGuiCol_NavWindowingHighlight]  = GetColor(White, Alpha80);
        colors[ImGuiCol_NavWindowingDimBg]      = GetColor(White, Alpha20);
        colors[ImGuiCol_ModalWindowDimBg]       = GetColor(Black, Alpha60);

        ImGui::GetStyle().WindowMenuButtonPosition = ImGuiDir_Right;
    }
};`

Yet another dark theme:
image

    imGuiIO.Fonts->AddFontFromFileTTF("../data/Fonts/Ruda-Bold.ttf", 15.0f, &config);
    ImGui::GetStyle().FrameRounding = 4.0f;
    ImGui::GetStyle().GrabRounding = 4.0f;

    ImVec4* colors = ImGui::GetStyle().Colors;
    colors[ImGuiCol_Text] = ImVec4(0.95f, 0.96f, 0.98f, 1.00f);
    colors[ImGuiCol_TextDisabled] = ImVec4(0.36f, 0.42f, 0.47f, 1.00f);
    colors[ImGuiCol_WindowBg] = ImVec4(0.11f, 0.15f, 0.17f, 1.00f);
    colors[ImGuiCol_ChildBg] = ImVec4(0.15f, 0.18f, 0.22f, 1.00f);
    colors[ImGuiCol_PopupBg] = ImVec4(0.08f, 0.08f, 0.08f, 0.94f);
    colors[ImGuiCol_Border] = ImVec4(0.08f, 0.10f, 0.12f, 1.00f);
    colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
    colors[ImGuiCol_FrameBg] = ImVec4(0.20f, 0.25f, 0.29f, 1.00f);
    colors[ImGuiCol_FrameBgHovered] = ImVec4(0.12f, 0.20f, 0.28f, 1.00f);
    colors[ImGuiCol_FrameBgActive] = ImVec4(0.09f, 0.12f, 0.14f, 1.00f);
    colors[ImGuiCol_TitleBg] = ImVec4(0.09f, 0.12f, 0.14f, 0.65f);
    colors[ImGuiCol_TitleBgActive] = ImVec4(0.08f, 0.10f, 0.12f, 1.00f);
    colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.00f, 0.00f, 0.00f, 0.51f);
    colors[ImGuiCol_MenuBarBg] = ImVec4(0.15f, 0.18f, 0.22f, 1.00f);
    colors[ImGuiCol_ScrollbarBg] = ImVec4(0.02f, 0.02f, 0.02f, 0.39f);
    colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.20f, 0.25f, 0.29f, 1.00f);
    colors[ImGuiCol_ScrollbarGrabHovered] = ImVec4(0.18f, 0.22f, 0.25f, 1.00f);
    colors[ImGuiCol_ScrollbarGrabActive] = ImVec4(0.09f, 0.21f, 0.31f, 1.00f);
    colors[ImGuiCol_CheckMark] = ImVec4(0.28f, 0.56f, 1.00f, 1.00f);
    colors[ImGuiCol_SliderGrab] = ImVec4(0.28f, 0.56f, 1.00f, 1.00f);
    colors[ImGuiCol_SliderGrabActive] = ImVec4(0.37f, 0.61f, 1.00f, 1.00f);
    colors[ImGuiCol_Button] = ImVec4(0.20f, 0.25f, 0.29f, 1.00f);
    colors[ImGuiCol_ButtonHovered] = ImVec4(0.28f, 0.56f, 1.00f, 1.00f);
    colors[ImGuiCol_ButtonActive] = ImVec4(0.06f, 0.53f, 0.98f, 1.00f);
    colors[ImGuiCol_Header] = ImVec4(0.20f, 0.25f, 0.29f, 0.55f);
    colors[ImGuiCol_HeaderHovered] = ImVec4(0.26f, 0.59f, 0.98f, 0.80f);
    colors[ImGuiCol_HeaderActive] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
    colors[ImGuiCol_Separator] = ImVec4(0.20f, 0.25f, 0.29f, 1.00f);
    colors[ImGuiCol_SeparatorHovered] = ImVec4(0.10f, 0.40f, 0.75f, 0.78f);
    colors[ImGuiCol_SeparatorActive] = ImVec4(0.10f, 0.40f, 0.75f, 1.00f);
    colors[ImGuiCol_ResizeGrip] = ImVec4(0.26f, 0.59f, 0.98f, 0.25f);
    colors[ImGuiCol_ResizeGripHovered] = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
    colors[ImGuiCol_ResizeGripActive] = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
    colors[ImGuiCol_Tab] = ImVec4(0.11f, 0.15f, 0.17f, 1.00f);
    colors[ImGuiCol_TabHovered] = ImVec4(0.26f, 0.59f, 0.98f, 0.80f);
    colors[ImGuiCol_TabActive] = ImVec4(0.20f, 0.25f, 0.29f, 1.00f);
    colors[ImGuiCol_TabUnfocused] = ImVec4(0.11f, 0.15f, 0.17f, 1.00f);
    colors[ImGuiCol_TabUnfocusedActive] = ImVec4(0.11f, 0.15f, 0.17f, 1.00f);
    colors[ImGuiCol_PlotLines] = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
    colors[ImGuiCol_PlotLinesHovered] = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
    colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
    colors[ImGuiCol_PlotHistogramHovered] = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
    colors[ImGuiCol_TextSelectedBg] = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
    colors[ImGuiCol_DragDropTarget] = ImVec4(1.00f, 1.00f, 0.00f, 0.90f);
    colors[ImGuiCol_NavHighlight] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
    colors[ImGuiCol_NavWindowingHighlight] = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
    colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
    colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);

Classic Steam/Half-Life VGUI theme

image

    ImVec4* colors = ImGui::GetStyle().Colors;
    colors[ImGuiCol_Text]                              = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
    colors[ImGuiCol_TextDisabled]              = ImVec4(0.50f, 0.50f, 0.50f, 1.00f);
    colors[ImGuiCol_WindowBg]                          = ImVec4(0.29f, 0.34f, 0.26f, 1.00f);
    colors[ImGuiCol_ChildBg]                                = ImVec4(0.29f, 0.34f, 0.26f, 1.00f);
    colors[ImGuiCol_PopupBg]                                = ImVec4(0.24f, 0.27f, 0.20f, 1.00f);
    colors[ImGuiCol_Border]                          = ImVec4(0.54f, 0.57f, 0.51f, 0.50f);
    colors[ImGuiCol_BorderShadow]              = ImVec4(0.14f, 0.16f, 0.11f, 0.52f);
    colors[ImGuiCol_FrameBg]                                = ImVec4(0.24f, 0.27f, 0.20f, 1.00f);
    colors[ImGuiCol_FrameBgHovered]          = ImVec4(0.27f, 0.30f, 0.23f, 1.00f);
    colors[ImGuiCol_FrameBgActive]            = ImVec4(0.30f, 0.34f, 0.26f, 1.00f);
    colors[ImGuiCol_TitleBg]                                = ImVec4(0.24f, 0.27f, 0.20f, 1.00f);
    colors[ImGuiCol_TitleBgActive]            = ImVec4(0.29f, 0.34f, 0.26f, 1.00f);
    colors[ImGuiCol_TitleBgCollapsed]          = ImVec4(0.00f, 0.00f, 0.00f, 0.51f);
    colors[ImGuiCol_MenuBarBg]                        = ImVec4(0.24f, 0.27f, 0.20f, 1.00f);
    colors[ImGuiCol_ScrollbarBg]                    = ImVec4(0.35f, 0.42f, 0.31f, 1.00f);
    colors[ImGuiCol_ScrollbarGrab]            = ImVec4(0.28f, 0.32f, 0.24f, 1.00f);
    colors[ImGuiCol_ScrollbarGrabHovered]   = ImVec4(0.25f, 0.30f, 0.22f, 1.00f);
    colors[ImGuiCol_ScrollbarGrabActive]    = ImVec4(0.23f, 0.27f, 0.21f, 1.00f);
    colors[ImGuiCol_CheckMark]                        = ImVec4(0.59f, 0.54f, 0.18f, 1.00f);
    colors[ImGuiCol_SliderGrab]                      = ImVec4(0.35f, 0.42f, 0.31f, 1.00f);
    colors[ImGuiCol_SliderGrabActive]          = ImVec4(0.54f, 0.57f, 0.51f, 0.50f);
    colors[ImGuiCol_Button]                          = ImVec4(0.29f, 0.34f, 0.26f, 0.40f);
    colors[ImGuiCol_ButtonHovered]            = ImVec4(0.35f, 0.42f, 0.31f, 1.00f);
    colors[ImGuiCol_ButtonActive]              = ImVec4(0.54f, 0.57f, 0.51f, 0.50f);
    colors[ImGuiCol_Header]                          = ImVec4(0.35f, 0.42f, 0.31f, 1.00f);
    colors[ImGuiCol_HeaderHovered]            = ImVec4(0.35f, 0.42f, 0.31f, 0.6f);
    colors[ImGuiCol_HeaderActive]              = ImVec4(0.54f, 0.57f, 0.51f, 0.50f);
    colors[ImGuiCol_Separator]                        = ImVec4(0.14f, 0.16f, 0.11f, 1.00f);
    colors[ImGuiCol_SeparatorHovered]          = ImVec4(0.54f, 0.57f, 0.51f, 1.00f);
    colors[ImGuiCol_SeparatorActive]                = ImVec4(0.59f, 0.54f, 0.18f, 1.00f);
    colors[ImGuiCol_ResizeGrip]                      = ImVec4(0.19f, 0.23f, 0.18f, 0.00f); // grip invis
    colors[ImGuiCol_ResizeGripHovered]        = ImVec4(0.54f, 0.57f, 0.51f, 1.00f);
    colors[ImGuiCol_ResizeGripActive]          = ImVec4(0.59f, 0.54f, 0.18f, 1.00f);
    colors[ImGuiCol_Tab]                                    = ImVec4(0.35f, 0.42f, 0.31f, 1.00f);
    colors[ImGuiCol_TabHovered]                      = ImVec4(0.54f, 0.57f, 0.51f, 0.78f);
    colors[ImGuiCol_TabActive]                        = ImVec4(0.59f, 0.54f, 0.18f, 1.00f);
    colors[ImGuiCol_TabUnfocused]              = ImVec4(0.24f, 0.27f, 0.20f, 1.00f);
    colors[ImGuiCol_TabUnfocusedActive]      = ImVec4(0.35f, 0.42f, 0.31f, 1.00f);
    colors[ImGuiCol_DockingPreview]          = ImVec4(0.59f, 0.54f, 0.18f, 1.00f);
    colors[ImGuiCol_DockingEmptyBg]          = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
    colors[ImGuiCol_PlotLines]                        = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
    colors[ImGuiCol_PlotLinesHovered]          = ImVec4(0.59f, 0.54f, 0.18f, 1.00f);
    colors[ImGuiCol_PlotHistogram]            = ImVec4(1.00f, 0.78f, 0.28f, 1.00f);
    colors[ImGuiCol_PlotHistogramHovered]   = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
    colors[ImGuiCol_TextSelectedBg]          = ImVec4(0.59f, 0.54f, 0.18f, 1.00f);
    colors[ImGuiCol_DragDropTarget]          = ImVec4(0.73f, 0.67f, 0.24f, 1.00f);
    colors[ImGuiCol_NavHighlight]              = ImVec4(0.59f, 0.54f, 0.18f, 1.00f);
    colors[ImGuiCol_NavWindowingHighlight]  = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
    colors[ImGuiCol_NavWindowingDimBg]        = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
    colors[ImGuiCol_ModalWindowDimBg]          = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);

    ImGuiStyle& style = ImGui::GetStyle();
    style.FrameBorderSize = 1.0f;
    style.WindowRounding = 0.0f;
    style.ChildRounding = 0.0f;
    style.FrameRounding = 0.0f;
    style.PopupRounding = 0.0f;
    style.ScrollbarRounding = 0.0f;
    style.GrabRounding = 0.0f;
    style.TabRounding = 0.0f;

Gold & Black styled theme, designed to fit the art style of Deus Ex: Human Revolution.

image

    ImGuiStyle* style = &ImGui::GetStyle();
    ImVec4* colors = style->Colors;

    colors[ImGuiCol_Text]                   = ImVec4(0.92f, 0.92f, 0.92f, 1.00f);
    colors[ImGuiCol_TextDisabled]           = ImVec4(0.44f, 0.44f, 0.44f, 1.00f);
    colors[ImGuiCol_WindowBg]               = ImVec4(0.06f, 0.06f, 0.06f, 1.00f);
    colors[ImGuiCol_ChildBg]                = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
    colors[ImGuiCol_PopupBg]                = ImVec4(0.08f, 0.08f, 0.08f, 0.94f);
    colors[ImGuiCol_Border]                 = ImVec4(0.51f, 0.36f, 0.15f, 1.00f);
    colors[ImGuiCol_BorderShadow]           = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
    colors[ImGuiCol_FrameBg]                = ImVec4(0.11f, 0.11f, 0.11f, 1.00f);
    colors[ImGuiCol_FrameBgHovered]         = ImVec4(0.51f, 0.36f, 0.15f, 1.00f);
    colors[ImGuiCol_FrameBgActive]          = ImVec4(0.78f, 0.55f, 0.21f, 1.00f);
    colors[ImGuiCol_TitleBg]                = ImVec4(0.51f, 0.36f, 0.15f, 1.00f);
    colors[ImGuiCol_TitleBgActive]          = ImVec4(0.91f, 0.64f, 0.13f, 1.00f);
    colors[ImGuiCol_TitleBgCollapsed]       = ImVec4(0.00f, 0.00f, 0.00f, 0.51f);
    colors[ImGuiCol_MenuBarBg]              = ImVec4(0.11f, 0.11f, 0.11f, 1.00f);
    colors[ImGuiCol_ScrollbarBg]            = ImVec4(0.06f, 0.06f, 0.06f, 0.53f);
    colors[ImGuiCol_ScrollbarGrab]          = ImVec4(0.21f, 0.21f, 0.21f, 1.00f);
    colors[ImGuiCol_ScrollbarGrabHovered]   = ImVec4(0.47f, 0.47f, 0.47f, 1.00f);
    colors[ImGuiCol_ScrollbarGrabActive]    = ImVec4(0.81f, 0.83f, 0.81f, 1.00f);
    colors[ImGuiCol_CheckMark]              = ImVec4(0.78f, 0.55f, 0.21f, 1.00f);
    colors[ImGuiCol_SliderGrab]             = ImVec4(0.91f, 0.64f, 0.13f, 1.00f);
    colors[ImGuiCol_SliderGrabActive]       = ImVec4(0.91f, 0.64f, 0.13f, 1.00f);
    colors[ImGuiCol_Button]                 = ImVec4(0.51f, 0.36f, 0.15f, 1.00f);
    colors[ImGuiCol_ButtonHovered]          = ImVec4(0.91f, 0.64f, 0.13f, 1.00f);
    colors[ImGuiCol_ButtonActive]           = ImVec4(0.78f, 0.55f, 0.21f, 1.00f);
    colors[ImGuiCol_Header]                 = ImVec4(0.51f, 0.36f, 0.15f, 1.00f);
    colors[ImGuiCol_HeaderHovered]          = ImVec4(0.91f, 0.64f, 0.13f, 1.00f);
    colors[ImGuiCol_HeaderActive]           = ImVec4(0.93f, 0.65f, 0.14f, 1.00f);
    colors[ImGuiCol_Separator]              = ImVec4(0.21f, 0.21f, 0.21f, 1.00f);
    colors[ImGuiCol_SeparatorHovered]       = ImVec4(0.91f, 0.64f, 0.13f, 1.00f);
    colors[ImGuiCol_SeparatorActive]        = ImVec4(0.78f, 0.55f, 0.21f, 1.00f);
    colors[ImGuiCol_ResizeGrip]             = ImVec4(0.21f, 0.21f, 0.21f, 1.00f);
    colors[ImGuiCol_ResizeGripHovered]      = ImVec4(0.91f, 0.64f, 0.13f, 1.00f);
    colors[ImGuiCol_ResizeGripActive]       = ImVec4(0.78f, 0.55f, 0.21f, 1.00f);
    colors[ImGuiCol_Tab]                    = ImVec4(0.51f, 0.36f, 0.15f, 1.00f);
    colors[ImGuiCol_TabHovered]             = ImVec4(0.91f, 0.64f, 0.13f, 1.00f);
    colors[ImGuiCol_TabActive]              = ImVec4(0.78f, 0.55f, 0.21f, 1.00f);
    colors[ImGuiCol_TabUnfocused]           = ImVec4(0.07f, 0.10f, 0.15f, 0.97f);
    colors[ImGuiCol_TabUnfocusedActive]     = ImVec4(0.14f, 0.26f, 0.42f, 1.00f);
    colors[ImGuiCol_PlotLines]              = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
    colors[ImGuiCol_PlotLinesHovered]       = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
    colors[ImGuiCol_PlotHistogram]          = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
    colors[ImGuiCol_PlotHistogramHovered]   = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
    colors[ImGuiCol_TextSelectedBg]         = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
    colors[ImGuiCol_DragDropTarget]         = ImVec4(1.00f, 1.00f, 0.00f, 0.90f);
    colors[ImGuiCol_NavHighlight]           = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
    colors[ImGuiCol_NavWindowingHighlight]  = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
    colors[ImGuiCol_NavWindowingDimBg]      = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
    colors[ImGuiCol_ModalWindowDimBg]       = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);

    style->FramePadding = ImVec2(4, 2);
    style->ItemSpacing = ImVec2(10, 2);
    style->IndentSpacing = 12;
    style->ScrollbarSize = 10;

    style->WindowRounding = 4;
    style->FrameRounding = 4;
    style->PopupRounding = 4;
    style->ScrollbarRounding = 6;
    style->GrabRounding = 4;
    style->TabRounding = 4;

    style->WindowTitleAlign = ImVec2(1.0f, 0.5f);
    style->WindowMenuButtonPosition = ImGuiDir_Right;

    style->DisplaySafeAreaPadding = ImVec2(4, 4);

SonicRiders_Ahl9Mhw7S2

C# (DearImguiSharp / My Own Wrapper)

var io = ImGui.GetIO();
var fontPath = Path.Combine(modFolder, "Assets/Fonts/Ruda-Bold.ttf");
var font = ImGui.ImFontAtlasAddFontFromFileTTF(io.Fonts, fontPath, 15.0f, null, ref Unsafe.AsRef<ushort>((void*)0x0));
if (font != null) 
    io.FontDefault = font;

var style = ImGui.GetStyle();
style.FrameRounding = 4.0f;
style.WindowBorderSize = 0.0f;
style.PopupBorderSize = 0.0f;
style.GrabRounding = 4.0f;

var colors = style.Colors;
colors[(int) ImGuiCol.ImGuiColText] = new Vector4(1.00f, 1.00f, 1.00f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTextDisabled] = new Vector4(0.73f, 0.75f, 0.74f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColWindowBg] = new Vector4(0.09f, 0.09f, 0.09f, 0.94f).ToImVec();
colors[(int) ImGuiCol.ImGuiColChildBg] = new Vector4(0.00f, 0.00f, 0.00f, 0.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColPopupBg] = new Vector4(0.08f, 0.08f, 0.08f, 0.94f).ToImVec();
colors[(int) ImGuiCol.ImGuiColBorder] = new Vector4(0.20f, 0.20f, 0.20f, 0.50f).ToImVec();
colors[(int) ImGuiCol.ImGuiColBorderShadow] = new Vector4(0.00f, 0.00f, 0.00f, 0.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColFrameBg] = new Vector4(0.71f, 0.39f, 0.39f, 0.54f).ToImVec();
colors[(int) ImGuiCol.ImGuiColFrameBgHovered] = new Vector4(0.84f, 0.66f, 0.66f, 0.40f).ToImVec();
colors[(int) ImGuiCol.ImGuiColFrameBgActive] = new Vector4(0.84f, 0.66f, 0.66f, 0.67f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTitleBg] = new Vector4(0.47f, 0.22f, 0.22f, 0.67f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTitleBgActive] = new Vector4(0.47f, 0.22f, 0.22f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTitleBgCollapsed] = new Vector4(0.47f, 0.22f, 0.22f, 0.67f).ToImVec();
colors[(int) ImGuiCol.ImGuiColMenuBarBg] = new Vector4(0.34f, 0.16f, 0.16f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColScrollbarBg] = new Vector4(0.02f, 0.02f, 0.02f, 0.53f).ToImVec();
colors[(int) ImGuiCol.ImGuiColScrollbarGrab] = new Vector4(0.31f, 0.31f, 0.31f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColScrollbarGrabHovered] = new Vector4(0.41f, 0.41f, 0.41f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColScrollbarGrabActive] = new Vector4(0.51f, 0.51f, 0.51f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColCheckMark] = new Vector4(1.00f, 1.00f, 1.00f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColSliderGrab] = new Vector4(0.71f, 0.39f, 0.39f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColSliderGrabActive] = new Vector4(0.84f, 0.66f, 0.66f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColButton] = new Vector4(0.47f, 0.22f, 0.22f, 0.65f).ToImVec();
colors[(int) ImGuiCol.ImGuiColButtonHovered] = new Vector4(0.71f, 0.39f, 0.39f, 0.65f).ToImVec();
colors[(int) ImGuiCol.ImGuiColButtonActive] = new Vector4(0.20f, 0.20f, 0.20f, 0.50f).ToImVec();
colors[(int) ImGuiCol.ImGuiColHeader] = new Vector4(0.71f, 0.39f, 0.39f, 0.54f).ToImVec();
colors[(int) ImGuiCol.ImGuiColHeaderHovered] = new Vector4(0.84f, 0.66f, 0.66f, 0.65f).ToImVec();
colors[(int) ImGuiCol.ImGuiColHeaderActive] = new Vector4(0.84f, 0.66f, 0.66f, 0.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColSeparator] = new Vector4(0.43f, 0.43f, 0.50f, 0.50f).ToImVec();
colors[(int) ImGuiCol.ImGuiColSeparatorHovered] = new Vector4(0.71f, 0.39f, 0.39f, 0.54f).ToImVec();
colors[(int) ImGuiCol.ImGuiColSeparatorActive] = new Vector4(0.71f, 0.39f, 0.39f, 0.54f).ToImVec();
colors[(int) ImGuiCol.ImGuiColResizeGrip] = new Vector4(0.71f, 0.39f, 0.39f, 0.54f).ToImVec();
colors[(int) ImGuiCol.ImGuiColResizeGripHovered] = new Vector4(0.84f, 0.66f, 0.66f, 0.66f).ToImVec();
colors[(int) ImGuiCol.ImGuiColResizeGripActive] = new Vector4(0.84f, 0.66f, 0.66f, 0.66f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTab] = new Vector4(0.71f, 0.39f, 0.39f, 0.54f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTabHovered] = new Vector4(0.84f, 0.66f, 0.66f, 0.66f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTabActive] = new Vector4(0.84f, 0.66f, 0.66f, 0.66f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTabUnfocused] = new Vector4(0.07f, 0.10f, 0.15f, 0.97f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTabUnfocusedActive] = new Vector4(0.14f, 0.26f, 0.42f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColPlotLines] = new Vector4(0.61f, 0.61f, 0.61f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColPlotLinesHovered] = new Vector4(1.00f, 0.43f, 0.35f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColPlotHistogram] = new Vector4(0.90f, 0.70f, 0.00f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColPlotHistogramHovered] = new Vector4(1.00f, 0.60f, 0.00f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColTextSelectedBg] = new Vector4(0.26f, 0.59f, 0.98f, 0.35f).ToImVec();
colors[(int) ImGuiCol.ImGuiColDragDropTarget] = new Vector4(1.00f, 1.00f, 0.00f, 0.90f).ToImVec();
colors[(int) ImGuiCol.ImGuiColNavHighlight] = new Vector4(0.41f, 0.41f, 0.41f, 1.00f).ToImVec();
colors[(int) ImGuiCol.ImGuiColNavWindowingHighlight] = new Vector4(1.00f, 1.00f, 1.00f, 0.70f).ToImVec();
colors[(int) ImGuiCol.ImGuiColNavWindowingDimBg] = new Vector4(0.80f, 0.80f, 0.80f, 0.20f).ToImVec();
colors[(int) ImGuiCol.ImGuiColModalWindowDimBg] = new Vector4(0.80f, 0.80f, 0.80f, 0.35f).ToImVec();
style.Colors = colors;

C++

// Sorry if there's any errors here, I translated this back by hand.
auto& io = ImGui::GetIO();
io.Fonts->AddFontFromFileTTF("Assets/Fonts//Ruda-Bold.ttf", 15.0f, &config);

auto& style = ImGui::GetStyle();
style.FrameRounding = 4.0f;
style.WindowBorderSize = 0.0f;
style.PopupBorderSize = 0.0f;
style.GrabRounding = 4.0f;

ImVec4* colors = ImGui::GetStyle().Colors;
colors[ImGuiCol_Text]                   = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
colors[ImGuiCol_TextDisabled]           = ImVec4(0.73f, 0.75f, 0.74f, 1.00f);
colors[ImGuiCol_WindowBg]               = ImVec4(0.09f, 0.09f, 0.09f, 0.94f);
colors[ImGuiCol_ChildBg]                = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_PopupBg]                = ImVec4(0.08f, 0.08f, 0.08f, 0.94f);
colors[ImGuiCol_Border]                 = ImVec4(0.20f, 0.20f, 0.20f, 0.50f);
colors[ImGuiCol_BorderShadow]           = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_FrameBg]                = ImVec4(0.71f, 0.39f, 0.39f, 0.54f);
colors[ImGuiCol_FrameBgHovered]         = ImVec4(0.84f, 0.66f, 0.66f, 0.40f);
colors[ImGuiCol_FrameBgActive]          = ImVec4(0.84f, 0.66f, 0.66f, 0.67f);
colors[ImGuiCol_TitleBg]                = ImVec4(0.47f, 0.22f, 0.22f, 0.67f);
colors[ImGuiCol_TitleBgActive]          = ImVec4(0.47f, 0.22f, 0.22f, 1.00f);
colors[ImGuiCol_TitleBgCollapsed]       = ImVec4(0.47f, 0.22f, 0.22f, 0.67f);
colors[ImGuiCol_MenuBarBg]              = ImVec4(0.34f, 0.16f, 0.16f, 1.00f);
colors[ImGuiCol_ScrollbarBg]            = ImVec4(0.02f, 0.02f, 0.02f, 0.53f);
colors[ImGuiCol_ScrollbarGrab]          = ImVec4(0.31f, 0.31f, 0.31f, 1.00f);
colors[ImGuiCol_ScrollbarGrabHovered]   = ImVec4(0.41f, 0.41f, 0.41f, 1.00f);
colors[ImGuiCol_ScrollbarGrabActive]    = ImVec4(0.51f, 0.51f, 0.51f, 1.00f);
colors[ImGuiCol_CheckMark]              = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
colors[ImGuiCol_SliderGrab]             = ImVec4(0.71f, 0.39f, 0.39f, 1.00f);
colors[ImGuiCol_SliderGrabActive]       = ImVec4(0.84f, 0.66f, 0.66f, 1.00f);
colors[ImGuiCol_Button]                 = ImVec4(0.47f, 0.22f, 0.22f, 0.65f);
colors[ImGuiCol_ButtonHovered]          = ImVec4(0.71f, 0.39f, 0.39f, 0.65f);
colors[ImGuiCol_ButtonActive]           = ImVec4(0.20f, 0.20f, 0.20f, 0.50f);
colors[ImGuiCol_Header]                 = ImVec4(0.71f, 0.39f, 0.39f, 0.54f);
colors[ImGuiCol_HeaderHovered]          = ImVec4(0.84f, 0.66f, 0.66f, 0.65f);
colors[ImGuiCol_HeaderActive]           = ImVec4(0.84f, 0.66f, 0.66f, 0.00f);
colors[ImGuiCol_Separator]              = ImVec4(0.43f, 0.43f, 0.50f, 0.50f);
colors[ImGuiCol_SeparatorHovered]       = ImVec4(0.71f, 0.39f, 0.39f, 0.54f);
colors[ImGuiCol_SeparatorActive]        = ImVec4(0.71f, 0.39f, 0.39f, 0.54f);
colors[ImGuiCol_ResizeGrip]             = ImVec4(0.71f, 0.39f, 0.39f, 0.54f);
colors[ImGuiCol_ResizeGripHovered]      = ImVec4(0.84f, 0.66f, 0.66f, 0.66f);
colors[ImGuiCol_ResizeGripActive]       = ImVec4(0.84f, 0.66f, 0.66f, 0.66f);
colors[ImGuiCol_Tab]                    = ImVec4(0.71f, 0.39f, 0.39f, 0.54f);
colors[ImGuiCol_TabHovered]             = ImVec4(0.84f, 0.66f, 0.66f, 0.66f);
colors[ImGuiCol_TabActive]              = ImVec4(0.84f, 0.66f, 0.66f, 0.66f);
colors[ImGuiCol_TabUnfocused]           = ImVec4(0.07f, 0.10f, 0.15f, 0.97f);
colors[ImGuiCol_TabUnfocusedActive]     = ImVec4(0.14f, 0.26f, 0.42f, 1.00f);
colors[ImGuiCol_PlotLines]              = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
colors[ImGuiCol_PlotLinesHovered]       = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
colors[ImGuiCol_PlotHistogram]          = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
colors[ImGuiCol_PlotHistogramHovered]   = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
colors[ImGuiCol_TextSelectedBg]         = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
colors[ImGuiCol_DragDropTarget]         = ImVec4(1.00f, 1.00f, 0.00f, 0.90f);
colors[ImGuiCol_NavHighlight]           = ImVec4(0.41f, 0.41f, 0.41f, 1.00f);
colors[ImGuiCol_NavWindowingHighlight]  = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
colors[ImGuiCol_NavWindowingDimBg]      = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
colors[ImGuiCol_ModalWindowDimBg]       = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);

Game in background is Sonic Riders from 2006, it's my first time using dear imgui and I wanted something to test with; love the library so far.

Made a Visual Studio-like theme for my game engine. I am using docking branch, so some settings should be removed if you are on master one
screenshot

constexpr auto ColorFromBytes = [](uint8_t r, uint8_t g, uint8_t b)
{
    return ImVec4((float)r / 255.0f, (float)g / 255.0f, (float)b / 255.0f, 1.0f);
};

auto& style = ImGui::GetStyle();
ImVec4* colors = style.Colors;

const ImVec4 bgColor           = ColorFromBytes(37, 37, 38);
const ImVec4 lightBgColor      = ColorFromBytes(82, 82, 85);
const ImVec4 veryLightBgColor  = ColorFromBytes(90, 90, 95);

const ImVec4 panelColor        = ColorFromBytes(51, 51, 55);
const ImVec4 panelHoverColor   = ColorFromBytes(29, 151, 236);
const ImVec4 panelActiveColor  = ColorFromBytes(0, 119, 200);

const ImVec4 textColor         = ColorFromBytes(255, 255, 255);
const ImVec4 textDisabledColor = ColorFromBytes(151, 151, 151);
const ImVec4 borderColor       = ColorFromBytes(78, 78, 78);

colors[ImGuiCol_Text]                 = textColor;
colors[ImGuiCol_TextDisabled]         = textDisabledColor;
colors[ImGuiCol_TextSelectedBg]       = panelActiveColor;
colors[ImGuiCol_WindowBg]             = bgColor;
colors[ImGuiCol_ChildBg]              = bgColor;
colors[ImGuiCol_PopupBg]              = bgColor;
colors[ImGuiCol_Border]               = borderColor;
colors[ImGuiCol_BorderShadow]         = borderColor;
colors[ImGuiCol_FrameBg]              = panelColor;
colors[ImGuiCol_FrameBgHovered]       = panelHoverColor;
colors[ImGuiCol_FrameBgActive]        = panelActiveColor;
colors[ImGuiCol_TitleBg]              = bgColor;
colors[ImGuiCol_TitleBgActive]        = bgColor;
colors[ImGuiCol_TitleBgCollapsed]     = bgColor;
colors[ImGuiCol_MenuBarBg]            = panelColor;
colors[ImGuiCol_ScrollbarBg]          = panelColor;
colors[ImGuiCol_ScrollbarGrab]        = lightBgColor;
colors[ImGuiCol_ScrollbarGrabHovered] = veryLightBgColor;
colors[ImGuiCol_ScrollbarGrabActive]  = veryLightBgColor;
colors[ImGuiCol_CheckMark]            = panelActiveColor;
colors[ImGuiCol_SliderGrab]           = panelHoverColor;
colors[ImGuiCol_SliderGrabActive]     = panelActiveColor;
colors[ImGuiCol_Button]               = panelColor;
colors[ImGuiCol_ButtonHovered]        = panelHoverColor;
colors[ImGuiCol_ButtonActive]         = panelHoverColor;
colors[ImGuiCol_Header]               = panelColor;
colors[ImGuiCol_HeaderHovered]        = panelHoverColor;
colors[ImGuiCol_HeaderActive]         = panelActiveColor;
colors[ImGuiCol_Separator]            = borderColor;
colors[ImGuiCol_SeparatorHovered]     = borderColor;
colors[ImGuiCol_SeparatorActive]      = borderColor;
colors[ImGuiCol_ResizeGrip]           = bgColor;
colors[ImGuiCol_ResizeGripHovered]    = panelColor;
colors[ImGuiCol_ResizeGripActive]     = lightBgColor;
colors[ImGuiCol_PlotLines]            = panelActiveColor;
colors[ImGuiCol_PlotLinesHovered]     = panelHoverColor;
colors[ImGuiCol_PlotHistogram]        = panelActiveColor;
colors[ImGuiCol_PlotHistogramHovered] = panelHoverColor;
colors[ImGuiCol_ModalWindowDarkening] = bgColor;
colors[ImGuiCol_DragDropTarget]       = bgColor;
colors[ImGuiCol_NavHighlight]         = bgColor;
colors[ImGuiCol_DockingPreview]       = panelActiveColor;
colors[ImGuiCol_Tab]                  = bgColor;
colors[ImGuiCol_TabActive]            = panelActiveColor;
colors[ImGuiCol_TabUnfocused]         = bgColor;
colors[ImGuiCol_TabUnfocusedActive]   = panelActiveColor;
colors[ImGuiCol_TabHovered]           = panelHoverColor;

style.WindowRounding    = 0.0f;
style.ChildRounding     = 0.0f;
style.FrameRounding     = 0.0f;
style.GrabRounding      = 0.0f;
style.PopupRounding     = 0.0f;
style.ScrollbarRounding = 0.0f;
style.TabRounding       = 0.0f;

My game engine's Dark theme:
ImguiTheme

ImGuiStyle& style = ImGui::GetStyle();
style.Colors[ImGuiCol_Text]                  = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
style.Colors[ImGuiCol_TextDisabled]          = ImVec4(0.50f, 0.50f, 0.50f, 1.00f);
style.Colors[ImGuiCol_WindowBg]              = ImVec4(0.13f, 0.14f, 0.15f, 1.00f);
style.Colors[ImGuiCol_ChildBg]               = ImVec4(0.13f, 0.14f, 0.15f, 1.00f);
style.Colors[ImGuiCol_PopupBg]               = ImVec4(0.13f, 0.14f, 0.15f, 1.00f);
style.Colors[ImGuiCol_Border]                = ImVec4(0.43f, 0.43f, 0.50f, 0.50f);
style.Colors[ImGuiCol_BorderShadow]          = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_FrameBg]               = ImVec4(0.25f, 0.25f, 0.25f, 1.00f);
style.Colors[ImGuiCol_FrameBgHovered]        = ImVec4(0.38f, 0.38f, 0.38f, 1.00f);
style.Colors[ImGuiCol_FrameBgActive]         = ImVec4(0.67f, 0.67f, 0.67f, 0.39f);
style.Colors[ImGuiCol_TitleBg]               = ImVec4(0.08f, 0.08f, 0.09f, 1.00f);
style.Colors[ImGuiCol_TitleBgActive]         = ImVec4(0.08f, 0.08f, 0.09f, 1.00f);
style.Colors[ImGuiCol_TitleBgCollapsed]      = ImVec4(0.00f, 0.00f, 0.00f, 0.51f);
style.Colors[ImGuiCol_MenuBarBg]             = ImVec4(0.14f, 0.14f, 0.14f, 1.00f);
style.Colors[ImGuiCol_ScrollbarBg]           = ImVec4(0.02f, 0.02f, 0.02f, 0.53f);
style.Colors[ImGuiCol_ScrollbarGrab]         = ImVec4(0.31f, 0.31f, 0.31f, 1.00f);
style.Colors[ImGuiCol_ScrollbarGrabHovered]  = ImVec4(0.41f, 0.41f, 0.41f, 1.00f);
style.Colors[ImGuiCol_ScrollbarGrabActive]   = ImVec4(0.51f, 0.51f, 0.51f, 1.00f);
style.Colors[ImGuiCol_CheckMark]             = ImVec4(0.11f, 0.64f, 0.92f, 1.00f);
style.Colors[ImGuiCol_SliderGrab]            = ImVec4(0.11f, 0.64f, 0.92f, 1.00f);
style.Colors[ImGuiCol_SliderGrabActive]      = ImVec4(0.08f, 0.50f, 0.72f, 1.00f);
style.Colors[ImGuiCol_Button]                = ImVec4(0.25f, 0.25f, 0.25f, 1.00f);
style.Colors[ImGuiCol_ButtonHovered]         = ImVec4(0.38f, 0.38f, 0.38f, 1.00f);
style.Colors[ImGuiCol_ButtonActive]          = ImVec4(0.67f, 0.67f, 0.67f, 0.39f);
style.Colors[ImGuiCol_Header]                = ImVec4(0.22f, 0.22f, 0.22f, 1.00f);
style.Colors[ImGuiCol_HeaderHovered]         = ImVec4(0.25f, 0.25f, 0.25f, 1.00f);
style.Colors[ImGuiCol_HeaderActive]          = ImVec4(0.67f, 0.67f, 0.67f, 0.39f);
style.Colors[ImGuiCol_Separator]             = style.Colors[ImGuiCol_Border];
style.Colors[ImGuiCol_SeparatorHovered]      = ImVec4(0.41f, 0.42f, 0.44f, 1.00f);
style.Colors[ImGuiCol_SeparatorActive]       = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
style.Colors[ImGuiCol_ResizeGrip]            = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_ResizeGripHovered]     = ImVec4(0.29f, 0.30f, 0.31f, 0.67f);
style.Colors[ImGuiCol_ResizeGripActive]      = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
style.Colors[ImGuiCol_Tab]                   = ImVec4(0.08f, 0.08f, 0.09f, 0.83f);
style.Colors[ImGuiCol_TabHovered]            = ImVec4(0.33f, 0.34f, 0.36f, 0.83f);
style.Colors[ImGuiCol_TabActive]             = ImVec4(0.23f, 0.23f, 0.24f, 1.00f);
style.Colors[ImGuiCol_TabUnfocused]          = ImVec4(0.08f, 0.08f, 0.09f, 1.00f);
style.Colors[ImGuiCol_TabUnfocusedActive]    = ImVec4(0.13f, 0.14f, 0.15f, 1.00f);
style.Colors[ImGuiCol_DockingPreview]        = ImVec4(0.26f, 0.59f, 0.98f, 0.70f);
style.Colors[ImGuiCol_DockingEmptyBg]        = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
style.Colors[ImGuiCol_PlotLines]             = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
style.Colors[ImGuiCol_PlotLinesHovered]      = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
style.Colors[ImGuiCol_PlotHistogram]         = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogramHovered]  = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TextSelectedBg]        = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
style.Colors[ImGuiCol_DragDropTarget]        = ImVec4(0.11f, 0.64f, 0.92f, 1.00f);
style.Colors[ImGuiCol_NavHighlight]          = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
style.Colors[ImGuiCol_NavWindowingHighlight] = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
style.Colors[ImGuiCol_NavWindowingDimBg]     = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
style.Colors[ImGuiCol_ModalWindowDimBg]      = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);
style.GrabRounding                           = style.FrameRounding = 2.3f;
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