Can you use the same quartz material on the backsplash?

The blue in your island is not a color I would have chosen to harmonize with those cherry cabinets, or the stone, honestly. If you are thinking of repeating that color with tile on the wall, I would say reconsider the neutral options.

If you are open to color correction, consider a deeper hue, and more of a teal for the island. It will pair better with the dark wood, and open you up to richer jewel tones in your backsplash tiles, whether you choose equally saturated or lighter hues.

If you can afford to use the counter material as a splash then do so. Otherwise use a muted subway tile that is matte.

The color of the island really pops against the dark cabinets. wood tone cabinets. Let the island be the focal point. A colored splash tile is going to be too hectic. (I agree that the island isn't really the right color with the dark cabinets. Any chance of painting the wood cabinets the same color as the island or the color of the countertops?)

i like the blue island..maybe the blue isnt the perfect shade but I'd work with it. look at stool coverings look at mats/ floor runners.... look at counter accessories. will pendants go in ? Given the ways to do these things, Id pick very simple white ceramic backsplash. can you put the gold fridge mat elsewhere ? Your kitchen is good looking.

Bar Stool, Folk Floral Jewel · More Info

Safavieh Monaco Collection MNC243 Rug, Navy/Light Blue, 2'2"x20' · More Info

Nuloom Dasilva Gabbeh Fringe Southwestern Area Rug, Blue 2'6"x8' · More Info

stained perimeter with blue island......appears they used simple white backsplash.

West Side Kitchen · More Info