Hey, I was original and painted the background burgundy. I have 3 show size fish a golden puffer, red coris wrasse, purple tang. 1 blue spotted sting ray, and 6 sm yellow tangs. Burgundy deff makes the color stand out, and believe it or not the fish are less stress then ever before. I can do water changes reach my hand in to move stuff around, and they don't lose their color as quick. Before this if I would reach in to clean my tank my purple tang would become into a ghost.
Edit: Oh, btw if you do decide on spray painting, make sure to leave all the doors open in your home if you do decide doing it inside your home. The fumes are toxic. Escpecially if you have any newborns.