Are you looking to add some color or stay neutral? I think a soft blue/green would be very pretty. Otherwise, I'd choose a light-medium tone from the tile.

We went with a neutral palette but I wasn't able to decide on a final paint color until I saw everything installed in our masterbath. Our painter put our preliminary choice on the wall as a primer coat and then we second coated with a slightly deeper shade of the same color because I felt that there was more contrast than I wanted between the walls and our dark cherry cabinets.

I really like the materials you've chosen and I'd love to see more pictures as your room comes together.

gold and gray are very popular now....

Well, I'm biased because we're using the same tile as you have, marble for the countertops and painting the cabinets a dark charcoal. We're going with Sherwin Williams Jetstream (6492) which is a medium blue. Open Air (6491) is a bit lighter..