PostCSS Color Mix Function

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

PostCSS Color Mix Function lets you use the color-mix() function following the CSS Color 5 Specification.

.purple_plum {
	color: color-mix(in lch, purple 50%, plum 50%);
}

/* becomes */

.purple_plum {
	color: rgb(175, 92, 174);
}

[!NOTE] We can not dynamically resolve var() arguments in color-mix(), only static values will work.

Add PostCSS Color Mix Function to your project:

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

Use it as a PostCSS plugin:

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

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

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

postcssColorMixFunction({ preserve: true })

.purple_plum {
	color: color-mix(in lch, purple 50%, plum 50%);
}

/* becomes */

.purple_plum {
	color: rgb(175, 92, 174);
	color: color-mix(in lch, purple 50%, plum 50%);
}