When doing wire comparisons between colors, I was surprised to find that only equality works. Would it be possible for color to be comparable as a partial order? It’s essentially asking the question, “Is this color used in making that color?” The order is partial because some primary and secondary color pairs fail this question in both directions.
More formally, these are the basic inequalities plus transitivity (e.g. w > y and y > r so w > r).
u > k
k > w
w > c
w > m
w > y
c > g
c > b
m > r
m > b
y > r
y > g