Now the walls make the ceiling look dirty. I think it's probably wise to get a ceiling paint which is usually a true white......and do that next When people want to paint the cabinets whether its a freshen up of an existing color with some minor touch up repairs or changing the color to something else...the walls are usually the last thing painted .. Getting help at Houzz is a great thing but always best at the beginning not in the middle of these kinds of actions. Another thing worth it would be go to lowes and get a trac light with LED 's or some sort of better ceiling light for your kitchen.........you will get a better outcome and see the colors better when you swap the old ceiling incandescent fixture for better lightng.