OTOH -- there are a number of linguistic rules about basic color terms. For instance, if a language has only three, they are white, black, and red. Then you add either yellow or green (which may include blue -- linguists call this color "grue"*), and then the other. After that you add blue (or split it out from green).
*You are in the dark. You may be eaten by an indeterminate color.
no subject
*You are in the dark. You may be eaten by an indeterminate color.