So you mean color just the middle part of the head? Since half the mace isn't even visible when held, would you notice it if only the middle changes? Or do you mean keep the corners as vanilla but color the rest of the head?
I thought about that, but the mace is already very clunky. Wouldn't a particle effect (similar to the small wind burst arcs) make it feel even clunkier?
Minecraft servers were down today, for a long while, but now they're up and the authentication problem should be fixed for you, just sign in a again if you're asked to, it'll work