I have a dark green Rayburn - here when we got the house, last house had navy blue which we chose. Love the green, although was difficult to match colour wise. Have gone for cream walls, units are wooden, painted a pale green and the worktops are black. Have blinds with green, cream and red check, and red piece of furniture at one end. My friend had lovely red AGA, pale yellow units and walls, wooden worktops and red gingham blinds and it was warm and snug. If you have a strong AGA colour then you can just pick out it's colour with a few bits and pieces, easier than having your walls a bright colour, and better if your kitchen isn't huge.