csstoolsCSS Color Parser 
Usage
Add CSS Color Parser to your project:
npm install @csstools/css-color-parser @csstools/css-parser-algorithms @csstools/css-tokenizer --save-dev
import { color } from '@csstools/css-color-parser';
import { isFunctionNode, parseComponentValue } from '@csstools/css-parser-algorithms';
import { serializeRGB } from '@csstools/css-color-parser';
import { tokenize } from '@csstools/css-tokenizer';
// color() expects a parsed component value.
const hwbComponentValue = parseComponentValue(tokenize({ css: 'hwb(10deg 10% 20%)' }));
const colorData = color(hwbComponentValue);
if (colorData) {
console.log(colorData);
// serializeRGB() returns a component value.
const rgbComponentValue = serializeRGB(colorData);
console.log(rgbComponentValue.toString());
}