The tiles seem to be a bit more muted than the granite and less polished; it doesn't look bad, they just fade into the background a little by comparison. If you want more of a pop, I'd go for a little more saturated color and perhaps a different finish/texture.

It feels a bit busy for the granite you have. Maybe a single color tile in a similar shape.

Glass subway tile in one clear color so as not to be too busy. Pick lightest color in the granite.

Hello Larry Dougherty

I would pick the off-white subway tile that would create a nice balance with both the cabinets as well as the granite. The beveled subway tile would give it nice touch and will look great with the under cabinet lights highlighting them.

Hope it helps

Hi---I think a varied sized glass tile installed vertically would look beautiful in this space. You could go dark-to make the wall recede or light, which will blend seamlessly with your elements. Very nice space. I really like the detail in the floor. Hope this is helpful. Good Luck!
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I'd just copy what Meredith did. Looks great!

Glass tile installed horizontal