What color is the vanity?

I would pick a color from the mosaic tile.

I wanted to light brown vanity but I'm not sure how it would look. Any suggestions?

where will this restroom be? who is it for? I'm seeing a light baby blue in the tile- if its a boys restroom might be cute to put baby blue or a nice gray one the walls.

your flooring pulls cool tones. Make sure your vanity also pull that same tone.

I love your floor tile! I would consider a denim blue color to go with those blue tiles. You could use this one, or ask to lighten this a few shades for a more pastel version.

A beautiful clay color would work because it's the complement and if it's a powder room you can get away with something a bit more bold.

The bathroom is in my new bedroom. I wanted marble grey or farmhouse ceramic tile and my husband hated it all. This is a compromise. In the end I was happy with it.

It should coordinate with your bedroom. And it also depends on your cabinet, floors, and lighting. Based just on the tiles, I would use white with a slight blue tint. You could always prime in white and then decide on the wall color once the room is completed.