Are you removing your current 4 inch backsplash and the backsplash behind the range?

Love your kitchen. I would only do a backsplash if you remove the granite on the walls. Then, do a cream subway tile or other simple tile in cream. Sounds ordinary, but there is a lot going on and simple is best in that case.

My older wood kitchen with cream tile - just enough to be pretty without making visual clutter:

https://www.houzz.com/photos/my-pics-work-in-progress-phvw-vp~110720042

It would have to be a very simple one to work in that very busy kitchen so maybe just keep what you have.