
Hey, Sismicious here.
I've worked on hair colors recently. Indeed, we first thought about a color randomization system, but there was a big problem : working this way only allows to darken and lighten every base color the same way. The more neutral way to do this is to use black and white and then lower their opacity.
But by doing so, we have dirty and ugly colors, whereas setting our own colors for everything is of course perfect...