I'm pretty sure you can't but the reason I ask this was because someone on Macforums a while ago said they brought in their phone 3 or 4 times for Applecare and that last time they got a different color. I'm extremely skeptical as to if that is true. Why would they just let you get a different color? That'd be cool if they could but I highly doubt they would do that. I don't know if that person was lying or if the Genius bent the rules a little. Have any of you heard anything like this?