Aww, but that'd take too long! I draw these in 10 minutes or less, and I enjoy such freedom. No planning is involved. Not only would color make it take longer, but then I'd have to think more. Things like camouflage, warning colors, etc. would also bias the imagination of the viewer. For example, were this mutant thingy, say, black, people would think him a night dweller, and if he was blue, then the assumption would be aquatic. So I leave it to my viewers to fill in the blanks. You'll get color in a commission, if you want.