Creative School Spirit Wear?

I'm competing in an upcoming school pageant at the end of the month and one of the categories consists of "Spirit Wear". This is the first category that I will be judged in, therefore it needs to be creative. Our school colors are royal blue, silver, and white. Our mascot is a warrior. If you have any ideas, or any links, please post them. I appreciate it a great deal. God Bless:)