Function hexToRgb

lib/util.js:211–225

* Parses a hex color string into RGB components. * Supports both 3-digit (#RGB) and 6-digit (#RRGGBB) formats. * @param {string} hex A valid hex color string * @returns {Buffer} The RGB components

(hex)

 * @returns {Buffer} The RGB components
 */
function hexToRgb(hex) {
  // Normalize to 6 digits
  let hexStr;
  if (hex.length === 4) {
    // Expand #RGB to #RRGGBB
    hexStr = hex[1] + hex[1] + hex[2] + hex[2] + hex[3] + hex[3];
  } else if (hex.length === 7) {
    hexStr = StringPrototypeSlice(hex, 1);
  } else {
    throw new ERR_OUT_OF_RANGE('hex', '#RGB or #RRGGBB', hex);
  }

  // TODO(araujogui): use Uint8Array.fromHex
  return Buffer.from(hexStr, 'hex');
}

/**
 * Generates the ANSI TrueColor (24-bit) escape sequence for a foreground color.