I've got a fantastic wireless optical mouse from Logitech. It works on pretty well any surface (one colour or more). Having a monocolour surface shouldn't be a problem, provided there's some sort of pattern to the surface (the grain in a piece of paper is sufficient!). Mine even seems to work on slightly reflective surfaces which is a first in my experience with optical mice. I find a sheet of clean, white paper works rather well with most mice though.