You don't need a uniform color: We used a mixture of brick red, browns and grays, and then threw in seashells, branches and various types of rock, so our walls ended up looking like cave paintings!
I feel it's the best thing that could have happened for me, leaving the Braves so I could go to another team that would give me more of a chance to play like with the Marlins.
In complete darkness we are all the same, it is only our knowledge and wisdom that separates us, don't let your eyes deceive you.