Function scale

src/ink/termio/osc.ts:333–334

(s: string)

  if (rgb) {
    // XParseColor: N hex digits → value / (16^N - 1), scale to 0-255
    const scale = (s: string) =>
      Math.round((parseInt(s, 16) / (16 ** s.length - 1)) * 255)
    return {
      type: 'rgb',
      r: scale(rgb[1]!),