Blue is 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. 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.
From:
http://desktoppub.about.com/cs/colorselection/p/blue.htm
