What Colors Would Look Good?

Alrighty, so my friend and I are going to a formal dance at our high school in May 2009, but as some of you may know, most of the good dresses are taken by then. So I need your help finding a dress for my friend. She has dark brown hair with reddish highlights, dark brown eyes, she's very pale but has freckles and blue undertones. If you can help, thank you! If you're leaving a suggestion that would be great! Love ya!