What do you make of this?
I looked at tray ceiling treatments on Houzz and decided to try the entire ceiling in a contrasting blue rather than just the uppermost part. We bought samples, tested the paint on test boards and taped it up against all three areas. We bought the gallon and put up a little on all three areas. Now it looks like completely different colors.
The dark area in the upper most corner is much darker than I expected and is the same paint as on the vertical mid section -- where it is lighter, less grey and a much too sweet baby blue. That is basically BM Beacon Gray at about 70%. The lighter area next to it is Lily White. You can't even see that one on the vertical section. I know the light makes a difference, but I wouldn't expect it to be so totally different like this. Any ideas on how to make it look right other than mixing different paints and hoping to make them look the same?