public ColorHSL SubtractHue(double amount) { return(new ColorHSL( DoubleEx.WrapAround(H - amount, 0, 1), S, L, A )); }
public ColorHSL AddHue(double amount) { return(new ColorHSL( DoubleEx.WrapAround(H + amount, 0, 1), S, L, A )); }