Our team shirts are royal blue. I personally like green and blue or a combination of the two. The first year our team shirts were black with a silver design which looked good close up but our team didn't really stand out when at competitions next to other teams. The only thing we found going with the black was you could work on the robot in the pits and get grease on you and it would never show.
Of course that also worked against you if you had grease on you and didn't know it and put on your jacket or got in your car and spread the grease to everything else.
