There are 5 bathrooms in just the upper floor of my house, and all of them (I think) have beige marble walls with white ceilings.
Which bathroom? I have three. Master bath has a light grey. Guest bath is an off white, bone color. The one off the garage is a soft butter yellow.
My masters is a blue and green with a faux finish that adds some texture. It looks like an ocean breeze. Really easy to do yourself and looks fantastic.
You have bathroom walls?
How strange a concept.