subway tile + open shelves (wood tones warm up grays). dark grout, gray floor tile For kitchen, lighten cabinets to match open shelves tones, add white subway tile w grey grout and keep grey paint on wall. Consider wood tile instead of hardwood floor.
I've seen this a lot so I just want to say that I don't like it when the TV is put above the fireplace. Lina: agree with Aaron re: TV. Love all the windows and light. Would be great to recreate a light, airy feeling in our space, if possible.