HSL and HUV would be useful for complementary colors if its hue is uniform enough. The problem is, they are not even that uniform. In some cases the complementa

HSL and HUV would be useful for complementary colors if its hue is uniform enough. The problem is, they are not even that uniform. In some cases the complementary RGB hue can differ up to 30 degrees from the complementary CIELAB hue (which would be much closer to the true perceived hue) [1]. [1] https://en.wikipedia.org/wiki/File:Hsv-hues-cf-lch-hues.png https://en.wikipedia.org/wiki/File:Hsv-hues-cf-lch-hues.png