Please help us help you. by stating your question a little more directly.

Pictures would be helpful if you have them.

Sounds like a lot of white and gray - I love color, so I would probably be looking at wine red or lime green or teal or a deep rose pink - probably wall paper with bold color and pattern.

But what I love might not be appropriate in your home.

Work to develop a fleshed out concept for your room.

Our powder room.

Leave it as is and hang a large piece of art, or two, on that back wall.