There is an amazing artist on deviant art named Dirk Shulz http://themrock.deviantart.com/
and I asked him how he colors his work. He gave me great advice on mixing colors and textures, so I tried it on my favorite Dragon Ball villain, Piccolo Daimao. I'm trying to make my colors more neutral rather than primary and basic. I wanna keep trying stuff like this more. Thanks Dirk!