What would you say if your kid asks what color he is?

DS randomly asked me the other day and I wasn't sure how to respond. We are caucasian but I felt weird telling him white. I didn't know if he'd take it too literally, because obviously we're not actually "white". I kind of laughed it off and told him he looked like peach crayon (from the day the crayons quit). And he agreed. When I asked him why he asked, I didn't really get an answer.

So what do you/have you said to that kind of question? I'm not really sure what is age appropriate. I know that conventional wisdom has changed and that you're not supposed to pretend kids are colorblind, but I love that right now he doesn't know really color is a way to categorize people.