Latex can be tinted with acrylic paints, like Mostly Fantasy said. You can also buy latex tint from Monstermakers, or get concentrated colorants from a paint store. Whatever you use, the raw tinted latex will never show the color strongly until it dries. For example, when I tint latex with black, it appears to be about a medium gray, but once it's cured it's black. So don't overdo the tint either---too much can weaken the latex (so I've heard) and wastes colorant. For most people, tinting the latex just gives them a good start towards painting it.
Freshly cured latex likes to stick to itself, Primo, which is why I always dust the inside of a cowl with baby powder before pulling it from the mold. Nothing sucks worse than having the insides of your bat ear stick together because it didn't get powdered! Once latex has cured for a few days, it generally won't stick to itself anymore.