In the new setting I'm making, I found an opportunity to make a species of humanoids that I simply couldn't resist. So I got to work, making the tribal herdsmen and hunters of the predominantly carnivorous Luugitsu. Though I've come to an impasse.
They are a species with a rare trait--which I call polythermy--that causes them to be able to change whether they are endothermic or ectothermic based on changing ambient temperatures, and are highly effective at comfortably surviving under a wider range of natural temperatures. Whether this will affect the answer or not I have no idea. Hell, it could cause them to have changing skin colours like Space Marines from Warhammer 40k. But they're also very skilled hunters and, when at war, guerrilla warriors, which I'm certain will most definitely affect their skin colour, or may possibly add patterns of contrasting colours to their skin. But with these in mind, what would be the most likely skin colour--and possibly coloured patterns--that they would select for?