@macrostrat/column-components/dist/chroma-js/src/io/hex/hex2rgb.js

React rendering primitives for stratigraphic columns

const RE_HEX = /^#?([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/;
const RE_HEXA = /^#?([A-Fa-f0-9]{8}|[A-Fa-f0-9]{4})$/;
const hex2rgb = (hex) => {
  if (hex.match(RE_HEX)) {
    if (hex.length === 4 || hex.length === 7) {
      hex = hex.substr(1);
    }
    if (hex.length === 3) {
      hex = hex.split("");
      hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
    }
    const u = parseInt(hex, 16);
    const r = u >> 16;
    const g = u >> 8 & 255;
    const b = u & 255;
    return [r, g, b, 1];
  }
  if (hex.match(RE_HEXA)) {
    if (hex.length === 5 || hex.length === 9) {
      hex = hex.substr(1);
    }
    if (hex.length === 4) {
      hex = hex.split("");
      hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2] + hex[3] + hex[3];
    }
    const u = parseInt(hex, 16);
    const r = u >> 24 & 255;
    const g = u >> 16 & 255;
    const b = u >> 8 & 255;
    const a = Math.round((u & 255) / 255 * 100) / 100;
    return [r, g, b, a];
  }
  throw new Error(`unknown hex color: ${hex}`);
};
export {
  hex2rgb as default
};
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