The taupe countertops are nice. Have you seen all the new choices of backsplash tiles that are available currently? There are so many beautiful ones, there isn't a need to settle on white subway tiles. Venture out to the big box stores or flooring showrooms and take a look... There are tile caps of all sizes to finish off the ends. A nice one is called a tile liner, and it's about 1/2"-wide. There's also metal strips that can be laid in to finish the tile, it looks very nice. They are called: Schluter Systems 0.375-in W x 98.5-in L Aluminum Commercial/Residential Tile Edge Trim and can be found at Lowe's. They come in different colors.

Stacked splashbacks always look wonderful!

Maybe a cream so the eye is drawn to the interesting table pattern and not on the splashback?

Can anyone tell me best height for tiles on vanity to use as a back splash I’m using 3 mirrors above I was going to drop mirrors to vanity but don’t like the look