Method fn

packages/react-stately/src/color/Color.ts:577–578

(n: number, k = (n + hue / 60) % 6)

    let saturation = this.saturation / 100;
    let brightness = this.brightness / 100;
    let fn = (n: number, k = (n + hue / 60) % 6) =>
      brightness - saturation * brightness * Math.max(Math.min(k, 4 - k, 1), 0);
    return new RGBColor(
      Math.round(fn(5) * 255),
      Math.round(fn(3) * 255),