Why Facebook uses Blue Color?

Why Facebook uses Blue Color?

An exciting fact: In its earlier days, thefacebook.com required you to have an .edu email id to join.

Everywhere from its login page to Facebook groups, you find only blue.
The reason for this is that Mark Zuckerberg, the young founder of Facebook is red-green color-blind and blue is the richest colour for him which he confirmed in an interview with Leo Laporte few years back.

Another important commercial factor for using blue color is the fact that most colors tend to distract the viewers. Blue on the other hand acts as a transparent background to the main content as visible to the human brain due to which most popular websites tend to use the blue color. It can easily be called a webmaster's favorite color. Blue Color is also sometimes referred to as 'Nirvana' for the brain.

All these factors make blue a prominent color on Facebook.