Omg, this is my idea. I think that by associating colors with functions we can type people based on the color clothing they wear, or their favorite colors or the color of their skin/eyes/toenails, etc, etc.
I'll start. I wear, almost exclusively, colors like browns, grey, dark reds, DARK BLUE, black and blue and/or gray jean.
My favorite colors are black and red because I'll always be a socialist libertarian at heart. My skin is a creamy Caucasian white, eyes are some kind of mixture of blues and greens and browns and my toenails are the color of island sunset.