white, but is hard to tell b/c he bottom photo is very dark

Thanks is this better?

yeah I still say white

If your floating shelves will remain white, go with the darker tile backsplash for contrast. If you are going with darker color floating shelves go with the lighter color tile.

Thanks so much

I agree with mountie, I think you should go with tones that would somehow go well in contrast with your countertop. I also think you should go for something light than gray to make your kitchen look a bit more brighter since it looks dark because of the shadows of the shelves. Hope that helps! Good luck :)

I agree with mountie and Planet Cabinets. I would try and match the backsplash with colors that are in the countertops. Definitely a light color! Excited to see what you decide!