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!
People seem to enjoy things more when they know a lot of other people have been left out of the pleasure.
What I think I've been able to do well over the years is play with pain, play with problems, play in all sorts of conditions.

