In addition to blue, I am also a big fan of using green in your bathroom design. The reason for this is that not only is it more unique, but it is aesthetically pleasing as well. The trick is that you do not want colors such as blue and green to be too bright in the space. This goes for any color pallet, but I think that when you go the route of green and blue you have to be careful. I like how traditional this bathroom is otherwise, and find it refreshing to see the creativity come from the color pallet.