I do like the countertop choice. But I am also a fan of a less busy quartz countertop like this one. Still has the subtle veins in it, but it's not too busy for a bathroom. Plus I love the idea of a white vanity popping against the navy color the room. The sample in your photo could take away from the "pop" factor in my opinion. But I do think your sample is a beautiful piece of stone for sure. Good luck with your renovation!

I consider myself something of a color expert. With your tile color, I would stay away from pinks. The best color for you will depend on if you like the tile color and want to contrast it to make it appear more green, or if you want to make it stand out less. For a little bit of complementary contrast, try a sample of Ben Moore's Dreamy Cloud which is a light purple grey with a light reflection value of 77.92 which is nice and light. In the pic, it looks like you mainly use artificial lighting which makes it a warm green rather than a cool green that it would be in natural light, so for less contrast, I would go with a light warm green like Ben Moore's Palest Pistachio. It's a beautiful green but very light which will help the room appear larger and brighter and should make your floor appear less green. The LRV is 85.64, which will really help if you need the room to be brighter.

I would need more info and some pictures of the space before guessing. I like colored walls in bathrooms but depends on the spaceand also what else is in there

Thank you all for your comments. The bathroom is a lot of whitish (large hex tile floor/large format tile shower alcove, and a white (long double sink) quartz vanity counter/also top of pony wall). The vanity is oak. All the fixtures/vanity lights are brass (aged). There is a window at the far end. I thought just off white walls might be too much white, although I guess I could change that with wall "add ons". We live in a country setting, the house is a shrine to mother nature : ), so that is where the green comes from.