In our home we have a tiny little powder room. It's only about three feet by six feet (most of which is taken up by the toilet and sink), so you can imagine that it gets pretty crowded when both of my children inevitably follow me in there (boo). Anyway. For the longest time we did absolutely nothing with it. Builder off-white paint, boring mirror, etc.
I got sick of it about a month ago and just bought a gallon of mint green paint on impulse. We threw the paint on the walls, put up a new mirror and light fixture, and it wasn't as boring anymore. But it. was. green.