npm install @csstools/postcss-color-function --save-devPostCSS 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);
}Add PostCSS Color Function to your project:
npm install postcss @csstools/postcss-color-function --save-devUse it as a PostCSS plugin:
const postcss = require('postcss');
const postcssColorFunction = require('@csstools/postcss-color-function');
postcss([
postcssColorFunction(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);PostCSS Color Function runs in all Node environments, with special instructions for:
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);
}
}The enableProgressiveCustomProperties option determines whether the original notation
is wrapped with @supports when used in Custom Properties. By default, it is enabled.
Note
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
.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);
}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).