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