Facebook is blue because mark zuckerbeg is colour-blind

The dominant colour of facebook is blue as the company Co-founder and CEO mark zuckerberg has red-green colour blindness. Zuckerberg who took an online test and realised that he was colour-blind, revealed in an interview, "Blue is the richest colour for me, I can see all of blue." Notably, the networking site is launched on Feb 4, 2004.