@onesy/utils/esm/darken.js

Utils

import is from './is';
import clamp from './clamp';
import colorToRgb from './colorToRgb';

const darken = (value, coefficient) => {
  const values = colorToRgb(value, undefined, true);

  if (is('array', values) && values.length >= 3) {
    values.slice(0, 3).forEach((_, index) => values[index] *= 1 - clamp(coefficient, 0, 1));
    const [r, g, b, a] = [...values.slice(0, 3).map(item => Math.round(Number(item))), values[3]];
    return "rgb".concat(a ? 'a' : '', "(").concat(r, ", ").concat(g, ", ").concat(b).concat(a ? ", ".concat(a) : '', ")");
  }
};

export default darken;