Don't be afraid to go dark in small places. Dark works amazingly well in small places-imagine huge room that you use all the time painted dark..not for the weak nerves. While in smaller places, especially ones where you spend just so and so amount of time, dark is enveloping, cozy and calming actually-or elegant and striking, depending on the direction you take. Don't be afraid of contrast with white fixtures. Dark loves some white, and light touches, shiny surfaces like in your mirrors or lighting fixtures, metal (fixtures yet again, and picture frames for example)..it can become easily one of your favorite places in the house if you treat it like a little room. Go with one of the colors in your tile(it already has many, so I'd keep to one of them)...if your ceiling is standard-tint it with a wall color, in proportion more then usual, so it won't feel like a box with a white lid (usual proportion is around 5-10%..that' what good painters do when painting rooms. In rooms with standard ceilings and dark walls you might want to go as high as 50%..check it all of course beforehand, play with the proportion. every room has its own light thus its own rules. it won't make a room darker; it will create the illusion of a higher ceiling though, and prevent the white lid effect). If the ceiling is higher, then you have less to worry. But I'd tint the ceiling some anyway. Also, crown molding helps a lot in these cases..the line where walls and ceilings meet seems softer and somehow more pleasing to the eye. If you leave your paint semi gloss-it will also create the illusion of a room less dark, because the sheen is so reflective. Add art you love, and generally have fun with it-a rug in a richer tome/interesting pattern, a shower curtain that picks up the color, even just in a tiny detail, a little plant, an interesting mug instead of a regular toothbrush holder..you won't pay attention to the tiles you're not a fan of, because the bathroom will have other things you love, in abundance. Disclaimer: everything I suggest here, I went through myself..))

Pretty! I am doing a similar tile in my bathroom remodel right now. Are you only open to Sherwin Williams? Because Benjamin Moore has some beautiful gray bathroom colors, better than SW in my opinion. I’ve done a lot of research and made a lot of mistakes lol. Here is a good article. I’m doing gray owl, myself. https://www.kylieminteriors.ca/the-9-best-benjamin-moore-paint-colors-grays-including-undertones/

It's going to be a pink sink because that's what we already have, and my husband and oldest daughter begged me to keep it. Current sink is chipped though. I went on Ebay to buy them a new pink sink. They both hate change--probably the reason they are lobbying to keep blue walls. Bamboo vanity and marble countertop are our designer's recommendations. The vanity is ordered, so we're stuck with that, although I could paint it. The countertop, I could still change. I will think about that. Honestly, I don't really like any of the new components, especially the pink sink. But I already folded on that. Wall color is the one place I can try to improve things. Husband and daughter agreed to get rid of the blue paint if Houzz members said we should. This is a small add-on to a major kitchen remodel. I'm not asking our designer about paint because 1) I think it's outside of what we contracted for; and 2) she's trying to solve a last-minute kitchen issue so we can start construction on time. Attaching photos. The sink in the photo is not staying. New sink is the paler Bridal Pink type color. Room faces south and gets good natural light, also bright light from the vanity fixture (which will also change eventually). I don't have a great link to the vanity color, it's the caramelized bamboo option on this page: Bamboo Example

I checked out accesible beige and it doesnt work well with my blue pearl granite. I now thinking alabaster. My trim and ceiling are alabaster so it may have to be this color.