LightAtPlay

function hsv(h, s = 1, v = 1, a = 1, p, q, t) = (p == undef || q == undef || t == undef)
	? hsv(
		(h%1) * 6,
		s<0?0:s>1?1:s,
		v<0?0:v>1?1:v,
		a,
		(v<0?0:v>1?1:v) * (1 - (s<0?0:s>1?1:s)),
		(v<0?0:v>1?1:v) * (1 - (s<0?0:s>1?1:s) * ((h%1)*6-floor((h%1)*6))),
		(v<0?0:v>1?1:v) * (1 - (s<0?0:s>1?1:s) * (1 - ((h%1)*6-floor((h%1)*6))))
	)