FFG ... please consider changing the dice colors. Two reasons:
(1) Even though the attack and defense dice are different types, having them be the same colors is still potentially confusing ("Roll a red die ... which red die?"). Keep the game as clear and usable as possible by ensuring the attack and defense dice are completely distinct in shape, color, and symbols.
(2) We know you're eventually going to have organized play prizes for Regionals or some such that are transparent dice. I have some from IA and the colored ones are absolute jewels ... but the black and white ones just look bad. More color selections = more opportunity for cool-looking dice.