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+# PostCSS Gamut Mapping [<img src="https://postcss.github.io/postcss/logo.svg" alt="PostCSS Logo" width="90" height="90" align="right">][PostCSS]
+
+[<img alt="npm version" src="https://img.shields.io/npm/v/@csstools/postcss-gamut-mapping.svg" height="20">][npm-url] [<img alt="CSS Standard Status" src="https://cssdb.org/images/badges/gamut-mapping.svg" height="20">][css-url] [<img alt="Build Status" src="https://github.com/csstools/postcss-plugins/workflows/test/badge.svg" height="20">][cli-url] [<img alt="Discord" src="https://shields.io/badge/Discord-5865F2?logo=discord&logoColor=white">][discord]
+
+```bash
+npm install @csstools/postcss-gamut-mapping --save-dev
+```
+
+[PostCSS Gamut Mapping] lets you use wide gamut colors with gamut mapping for specific displays following the [CSS Color 4 Specification].
+
+When out of gamut colors are naively clipped the result can be radically different.  
+A saturated and bright color will be much darker after clipping.
+
+To correctly adjust colors for a narrow gamut display, the colors must be mapped.  
+This is done by lowering the `chroma` in `oklch` until the color is in gamut.  
+
+Using the `@media (color-gamut)` media feature makes it possible to only use the wide gamut colors on displays that support them.
+
+```pcss
+p {
+	background-color: oklch(80% 0.05 0.39 / 0.5);
+	color: oklch(20% 0.234 0.39 / 0.5);
+	border-color: color(display-p3 0 1 0);
+}
+
+/* becomes */
+
+p {
+	background-color: oklch(80% 0.05 0.39 / 0.5);
+	color: rgba(50, 0, 20, 0.5);
+	border-color: rgb(0, 249, 66);
+}
+
+@media (color-gamut: rec2020) {
+p {
+	color: oklch(20% 0.234 0.39 / 0.5);
+}
+}
+
+@media (color-gamut: p3) {
+p {
+	border-color: color(display-p3 0 1 0);
+}
+}
+```
+
+## Usage
+
+Add [PostCSS Gamut Mapping] to your project:
+
+```bash
+npm install postcss @csstools/postcss-gamut-mapping --save-dev
+```
+
+Use it as a [PostCSS] plugin:
+
+```js
+const postcss = require('postcss');
+const postcssGamutMapping = require('@csstools/postcss-gamut-mapping');
+
+postcss([
+	postcssGamutMapping(/* pluginOptions */)
+]).process(YOUR_CSS /*, processOptions */);
+```
+
+[PostCSS Gamut Mapping] runs in all Node environments, with special
+instructions for:
+
+- [Node](INSTALL.md#node)
+- [PostCSS CLI](INSTALL.md#postcss-cli)
+- [PostCSS Load Config](INSTALL.md#postcss-load-config)
+- [Webpack](INSTALL.md#webpack)
+- [Next.js](INSTALL.md#nextjs)
+- [Gulp](INSTALL.md#gulp)
+- [Grunt](INSTALL.md#grunt)
+
+[cli-url]: https://github.com/csstools/postcss-plugins/actions/workflows/test.yml?query=workflow/test
+[css-url]: https://cssdb.org/#gamut-mapping
+[discord]: https://discord.gg/bUadyRwkJS
+[npm-url]: https://www.npmjs.com/package/@csstools/postcss-gamut-mapping
+
+[PostCSS]: https://github.com/postcss/postcss
+[PostCSS Gamut Mapping]: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-gamut-mapping
+[CSS Color 4 Specification]: https://www.w3.org/TR/css-color-4/#gamut-mapping