The 'devil' is a spirit being with no physical form of its own but i expect it can take most any form with whatever eue color it chooses. Satan was/is an angel created by God. It chose to oppose God and was cast from heaven. It diesnt have eyes unkess it takes a human or animal form.
He has pointed teeth. His lips are black. His eyes are said to be crying so maybe they're red? He never sleeps, so he also, probably has 'droopy' eyes. They never precisely identify the color in the Bible.