Before you commit, buy a pint sample so you can see how the colour looks in the actual room. Paint a board, place in different parts of the room and watch how the colour changes throughout the day. Does it grow bright and airy in the morning and then sepia-toned near dusk? Does it take on the tone of something out the window? Live with it a little. This way, you can find the colour that works for you, morning to night.