My gym used to be red, black, and white too but we changed it because 4 other gyms in the state had the same colors. My gym is like an emerald green and black now. It looks really pretty and I would never have put those together but they look so nice. Different colors are always good. It's so funny because at all the meets, the judges go, " Oh look! It's the Trumbull girls!" You want people to notice you! I think neon green and black would be cool but I agree with difficulty of making your gym that color. Personally, I like neon pink and black. Some other ideas are purple and white, turquise or teal and black, and a light pink with baby blue.