The black appliances and wood floors are neutrals. They might not be your choice, but they're completely workable. Pretend like they're not there.
Paint the cabinets and the bulkheads and the brick on the island all white to make it look like the cabinets go further than they do - you want to trick the eye.
Paint the walls whatever color on this earth you want. If you want white to continue the light and airy feel, go for it. A pale blue, green, lavender, gray, or yellow would all work and also keep things light.