Definition
CSS Typed OM Level 1 defines CSSHSL
[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
interface CSSHSL : CSSColorValue {
constructor(CSSColorAngle h, CSSColorPercent s, CSSColorPercent l, optional CSSColorPercent alpha = 1);
attribute CSSColorAngle h;
attribute CSSColorPercent s;
attribute CSSColorPercent l;
attribute CSSColorPercent alpha;
};