Lately people have been asking if there is any symbolism to the colors I give the characters in this series, but the answer is no. I simply color code them so people can quickly tell them apart and have started to use a wider range of colors for variety's sake because I got sick of pink and blue.
Isn't this behavior also to prevent infanticide by confusing paternity of children, in non-twin cases? The ease of taking care of children is rarely a drive for doing so in the animal kingdom.