All our bedrooms are the same neutral colour, just a shade off white, ivory lace I believe. Neutral walls are very calming for me.
Thinking about it, the whole house is that colour aside from the lounge which is a warmer shade of a similar neutral, and a hallway in a neutral light grey.
We use hue lighting colours to change the ambience across the house, can warm or cool a room depending on mood at that time.