We would look into painting the walls, the white quartz sounds really nice, and we would look into white backsplashes depending on what color you decide to paint. We will include some of our kitchen designs to help.

This kitchen needs some contrast. Don't go all white unless you want the space to feel like a dentist office.

Soapstone would make for a great contrast in this space, personally I would continue it up for a full height back splash as well.

Paint the blue on the walls, that way if you tire of the color you can easily change it for low cost.

Yes too much white can feel like a white out! Lol, I do like white. If keep ngreen, paint vent to match wall. Subway tile in gray is contrast with green or blue & looks good with white.