I think I'd keep it simple and go with a clean but not too bright white walls. Add white towels, white shower curtains, and nice wall art that contains at least a little navy blue in it.

Is that lighter color in the tile gray?
Whatever color that it, I would pick it up with the wall paint.

Hi---wallpaper upper wall, white paint for lower wall. Fabulous lights... I recommend chrome or brushed nickel finishes. Good Luck!
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A deep brown print wallpaper would look great paired with navy. (Those tiles are fabulous!!!)

I like the idea of wainscotting on the lower (white) and a darker upper. If you didn't have the bronze, I would suggest using a silver paint.

a grey/blue colour

If you have some tile left over, take with you to the paint store. Go with lightest blue/grey in the tile.

I think Marks idea is super cute.....You need something that can hold it's own with that bold, pretty tile.

I also like Natalie's gilded wallpaper idea. Something with some guts to it!!

Are you attached to the bronze, or might you switch to a chrome plated brass?? I just think the chrome with the blue is a stunning combo!

HI -- Because it is powder room you can pretty much do anything bold or different and have fun with it . Because you just asked for a paint color have a look at ...... Amsterdam by Benjamin Moore .