The Chromatic Domains
Color spread refers to a creature’s deviation from their race’s average. Specifically, each Color is given a positive or negative proportion of standard deviations from their racial Color composition. A creature’s Color spread indicates their compatibility with the various Colors and their attributes, and also determines their primary Color. The value on a creature’s Color spread that is most positive is that creature’s primary Color. The next most positive Color is their secondary Color, and so on. This seems to assure that chromats of various races are not overwhelmingly numerous in certain Colors.