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Color scheme for UI design.

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Open color

Open color is an open-source color scheme optimized for UI like font, background, border, etc.


  • All colors shall have adequate use
  • Provide general color for UI design
  • All colors will be beautiful in itself and harmonious
  • At the same brightness level, the perceived brightness will be constant


  • The colors are subject to change in the future. Thus, using an Open color as a main identity color is not recommended.

Available Colors

available colors


$ npm install open-color


$ bower install open-color

Currently Supported Formats, Language Environments, Libraries

CSS, Sass, Less, Stylus, JSON, SVG, TeX, Open Color Tools (.oco), PowerPaint (.rcpx), Sketch (.sketchpalette), Inkscape, aco, clr, Tailwind, TypeScript

Variable Convention

Sass, SCSS








  • oc
    : Abbreviation for Open color
  • (color)
    : Color name such as gray, red, lime, etc.
  • (number)
    : 0 to 9. Brightness spectrum.

How to Use

Import the file to your project and use the variables.

Example for Sass, SCSS

@import 'path/open-color';

.body { background-color: $oc-gray-0; color: $oc-gray-7; }

a { color: $oc-teal-7;

&:hover, &:focus, &:active { color: $oc-indigo-7; } }

Example for Tailwind CSS

module.exports = {
  presets: [require("./open-color.js")],
  purge: [],
  mode: "jit",
  darkMode: false,
  theme: {
    extend: {},
  variants: {
    extend: {},
  plugins: [],

Example for Less

@import 'path/open-color';

.body { background-color: @oc-gray-0; color: @oc-gray-7; }

a { color: @oc-teal-7;

&:hover, &:focus, &:active { color: @oc-indigo-7; } }

Example for Stylus

@import 'path/open-color.styl'

.body background-color: oc-gray-0 color: oc-gray-7

a color: oc-teal-7

&:hover &:focus &:active color: oc-indigo-7

Example for CSS

@import 'path/open-color.css';

.body { background-color: var(--oc-gray-0); color: var(--oc-gray-7); }

a { color: var(--oc-teal-7); }

a:hover, a:focus, a:active { color: var(--oc-indigo-7); }

Other Language Bindings

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