Color Psychology: Blue
Seeing the color blue actually causes the body to produce chemicals that are calming; but that isn't true of all shades of blue. Some shades (or too much blue) can send a cold and uncaring message. Many bedrooms are blue because it's calm, restful color. Over the ages blue has become associated with steadfastness, dependability, wisdom and loyalty (note how many uniforms are blue). People tend to be more productive in a blue room because they are calm and focused on the task at hand.