Halo - Master chief home made costume?

Tomorrow is Character day for homecoming week at school and I'm doing the chief. I have a legit helmet and gloves already but I'm wondering what some ideas are for making the body parts? What color shirt/pants? Should I make armor? Styrofoam maybe? Thanks.

Tomorrow is not long enough to make a costume like that if you dont already have it planned out and materials ready.

Maybe you should go for a long sleeve shirt, pants and maybe some colored cardboard for the chest plate, its all I can think of for quick and easy.