Blue

Blue is calming. It can be strong and steadfast or light and friendly. Almost everyone likes some shade of the color blue.

Nature of Blue:
A natural color, from the blue of the sky, blue is a universal color. The cool, calming effect of blue makes time pass more quickly and it can help you sleep. Blue is a good color for bedrooms. However, too much blue could dampen spirits.

Culture of Blue:
In many diverse cultures blue is significant in religious beliefs, brings peace, or is believed to keep the bad spirits away.
Blue conveys importance and confidence without being somber or sinister, hence the blue power suit of the corporate world and the blue uniforms of police officers. Long considered a corporate color, blue, especially darker blue, is associated with intelligence, stability, unity, and conservatism.
(http://desktoppub.about.com/cs/colorselection/p/blue.htm)