Table 1.

Parallelism of achromatic loci in various color spaces.

	CIELAB	CIECAM97s revised	CIECAM02	Nayatani	Hunt	RLAB
Top/bottom: red-green	1.11	2.04	1.27	0.64	2.29	1.45
Top/bottom: yellow-blue	1.69	3.37	2.08	0.76	1.63	2.25
Average	1.40	2.70	1.68	0.70	1.63	2.25