Consider gray tone glass tiles. You can go with matte or glossy finish depending on level of gloss on your floor or lacquer cabinets. Another option would be to use the countertop material although this tends to get expensive. Finally, consider using an accent color from the adjoining space to select he backsplash. This could provide contrast and some drama whereas the first two options provide a simpler, calmer look.

How about something like this? What do you think?