While this may be true, it also may not be the only reason that Facebook is blue. Yes, Zuckerberg can see blue better than other colors. But that isn’t how all businesses make their brand color choices.
Research suggests that, “90% of an assessment for trying out a product is made by color alone.” Different colors make us feel different things, and even react in different ways.
Certain colors are associated with specific emotions and personality traits, and consumers will often be drawn to colors that make them feel good, or that represent their personalities on some level.
So the decision to choose purple vs. red for one of your main brand colors should necessarily be taken lightly. Find out more about the science of color and how it affects marketing in this article by Gregory Ciotti.