Generally, soothing, cool colors are preferred for a bedroom. That's why soft pastels, blues, and greens are so popular for a bedroom. Of course, this goes out the window for teenagers who prefer bright bold colors that reflect their high energy. The rest of us, well, we just want to some sleep after an exhausting day.
Here's an article that explains the psychology of color and common colors used in bedrooms. It will help you if you're trying to determine what color to paint your room. Read it here.
Also, see here for popular Benjamin Moore colors used for bedrooms. Buy a sample can to try at home or an entire gallon. Check out these restful colors here.