src/vs/base/common/color.ts/formatHSLA
			export function formatHSLA(color: Color): string {
				return `hsla(${color.hsla.h}, ${(color.hsla.s * 100).toFixed(2)}%, ${(color.hsla.l * 100).toFixed(2)}%, ${color.hsla.a.toFixed(2)})`;
			}