Thread:Zf6hellion/@comment-9330998-20130109174651/@comment-1493741-20130109182822

Oh, its colour symbolism, I'm matching up appropritate shades of colours that tie in to traits, and seperating each race by a different set of cultural symbolism (Shinigami with the Western system, Fullbringers with medieval heraldry, Togabito with Hinduism etc.), got a nice site that lists most of them here and the heraldry here.