@csstools/postcss-color-function

PostCSS Color Function

npm install @csstools/postcss-color-function --save-dev

PostCSS Color Function lets you use the color function in CSS, following the CSS Color specification.

.color {
	color: color(display-p3 0.64331 0.19245 0.16771);
}

:root {
	--a-color: color(srgb 0.64331 0.19245 0.16771);
}

/* becomes */

.color {
	color: rgb(179, 35, 35);
}

:root {
	--a-color: rgb(164, 49, 43);
}

Usage

Add PostCSS Color Function to your project:

npm install postcss @csstools/postcss-color-function --save-dev

Use it as a PostCSS plugin:

const postcss = require('postcss');
const postcssColorFunction = require('@csstools/postcss-color-function');

postcss([
	postcssColorFunction(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);

Options

preserve

The preserve option determines whether the original notation is preserved. By default, it is not preserved.

postcssColorFunction({ preserve: true })

.color {
	color: color(display-p3 0.64331 0.19245 0.16771);
}

:root {
	--a-color: color(srgb 0.64331 0.19245 0.16771);
}

/* becomes */

.color {
	color: rgb(179, 35, 35);
	color: color(display-p3 0.64331 0.19245 0.16771);
}

:root {
	--a-color: rgb(164, 49, 43);
}

@supports (color: color(display-p3 0 0 0%)) {
:root {
	--a-color: color(srgb 0.64331 0.19245 0.16771);
}
}

enableProgressiveCustomProperties

The enableProgressiveCustomProperties option determines whether the original notation is wrapped with @supports when used in Custom Properties. By default, it is enabled.

We only recommend disabling this when you set preserve to false or if you bring your own fix for Custom Properties.
See what the plugin does in its README.

postcssColorFunction({ enableProgressiveCustomProperties: false })

.color {
	color: color(display-p3 0.64331 0.19245 0.16771);
}

:root {
	--a-color: color(srgb 0.64331 0.19245 0.16771);
}

/* becomes */

.color {
	color: rgb(179, 35, 35);
	color: color(display-p3 0.64331 0.19245 0.16771);
}

:root {
	--a-color: rgb(164, 49, 43);
	--a-color: color(srgb 0.64331 0.19245 0.16771);
}

Custom properties do not fallback to the previous declaration

Supported Color Spaces

.color-spaces {
	color: color(a98-rgb 0.803 0.484 0.944);
	color: color(display-p3 0.8434 0.509 0.934);
	color: color(prophoto-rgb 0.759 0.493 0.898);
	color: color(rec2020 0.772 0.491 0.920);
	color: color(srgb 0.897 0.488 0.959);
	color: color(srgb-linear 0.783 0.203 0.910);
	color: color(xyz 0.560 0.377 0.904);
	color: color(xyz-d50 0.550 0.375 0.680);
	color: color(xyz-d65 0.560 0.377 0.904);
}

Copyright : color conversions

This software or document includes material copied from or derived from https://github.com/w3c/csswg-drafts/tree/main/css-color-4. Copyright 2022 W3C (MIT, ERCIM, Keio, Beihang).