My eyes change color depending on lighting/what I'm wearing.

Perhaps you have hazel eyes too. Then again, to me hazel is synonymous with "other." How else do you explain eyes that are blue when you're little, mostly green, brown, or green/brown now, but occasionally change back to gray and slate blue from time to time.

And a bit more random, but I thought most stereotypical vampires had red eyes... (Mine have a high chance of having blue eyes, but I don't think they really count as "vampires" anymore.)