This stunning Sage green & cream shaker style kitchen featuring curved base units on the island is a perfect example of colour painted doors working well in kitchens. I myself have just chosen a sage green door for the showroom which has just been fitted & is awaiting worktops. I love the sage colour it's not to in your face, it's very soft & gives a little subtle character to a country sale kitchen.
The other painted door colour I think works well for a traditional kitchen is grey. Shown here with cream tiles & natural wood worktops & flooring with bright pops of red for a slightly more modern country feel.