About to paint a newly plastered room, north west facing, generally a bit dark-ish. Will have very playful wall colour, ranging from yellow, dark and light blue and pink. Now I find a little hard to decide on the ceiling, spoke with little greene colour consultant, they suggested going for a neutral white, I was gonna go for slaked lime but now thinking slaked lime - mid as it looks softer. but I am concerned if it would make the room too dark, or just a big "grey" for the ceiling. So wondered if anyone tried it and share some experiences?