Color difference predicted by color component differences

A relationship between assessed color differences and assessed components of colors is presented. The perceptual difference between colors j and k is converted to a lightness difference of two Munsell grays, V A and V B , and d jk = |V A − V B | . Scaled values of principal hue components of a color ξ α (H|V/C), α = R, Y, G, and B , are read from charts based on assessments of observers. Previous charts ( Color Research and Application , 1999, 24, 266–279) are enlarged and extended. A linear combination of ΔV = |V j − V k | and Δ ξ α = | ξ α (H j |V j /C j ) − ξ α (H k |V k /C k )|, d̃ jk , is the best to predict d jk . The root‐mean‐squares of (d jk − d̃ jk ) is 0.34 V, about one third of the lightness difference from V to V + 1 on the Munsell Value Scale.