KellieM Marazzi has a tile that looks like this- Vesale Stone in Smoke (Gray). This looks like a combination of their 20x20, 13x13 and maybe the 1x1 mosaic on the back wall.
13. Choose a vessel sink. This is a good opportunity to add a natural texture like stone. If you're trying to keep things clean and open, opt for clear glass.
Tub and shower share a floor drain. No more flooded bathrooms and curb less entry. Great for kids and great for older adults. Future proof and common sense. Universal design.
https://www.stoneforest.com/kitchen-bath/