for non-spawned color themes, I think it's like the rule with condoms and guns~
Better to have them and not need them, than to need them and not have them.
Adding them in and simply naming for example MGQ's goblin with "tanskin, or ebony?" cant remember at the moment, i havnt slept yet.
in otherwords, naming them a skin tag so they won't spawn naturally, but having them in incase someone changes a skin color, that option for a picture IS there.