public static void CheckHSLInRange(double _a, double _h, double _s, double _l)
{
ColorUtil.CheckRange_0_1(_a, typeof(ColorHSL), "A");
ColorUtil.CheckRange_0_1_NAN(_h, typeof(ColorHSL), "H");
ColorUtil.CheckRange_0_1_NAN(_s, typeof(ColorHSL), "S");
ColorUtil.CheckRange_0_1(_l, typeof(ColorHSL), "L");
ColorUtil.CheckCompatibleHS(_h, _s);
}