I have a kitchen with similar colours to yours. My walls are a buttery yellow, counter-top is a speckly grey colour, appliances are white and I painted the cupboards creamy off white. I had plain-front melamine cupboards. I added flat trim to make them looks like shaker cupboards and painted with 2 coats of Benjamin Moore melamine paint. I changed my cupboard handles to a brushed nickle. They've been like that for 11 years. It made me laugh that somebody mentioned, earlier in the thread, that shaker-style is considered up-to-date. I must have been ahead of my time