I think black looks really good, and also more intimidating than other colors. The black+red is a very good combination for intimidating people since in the animal kingdom its an indication of a dangerous/poisonous animal, and its programmed in our brains to fear thing with these colors. Its just working on psychology to try to get whatever advantage you can no matter how small (think of it the other way too, if the other team is wearing pink are they gonna intimidate you?).