LAB is one of the better ways to to start with perceptually uniform spacing of the colors. Also if the path through the color space avoids A and B being near 0,

LAB is one of the better ways to to start with perceptually uniform spacing of the colors. Also if the path through the color space avoids A and B being near 0, then the gray dead zone problem that this talks about goes away. There are multiple ways to look at differences in LAB space unfortunately. Each one more mathematically complex, yet more perceptually accurate: http://zschuessler.github.io/DeltaE/learn/ http://zschuessler.github.io/DeltaE/learn/ For a ton of useful equations and calculators: http://www.brucelindbloom.com/index.html http://www.brucelindbloom.com/index.html