Facebook's iconic blue palette communicates trust, connectivity, and calm reliability for the world's largest social network.
Facebook founder Mark Zuckerberg chose blue because he is red-green colorblind, and blue is the color he can see most vividly. Beyond that personal reason, blue psychologically signals trust, reliability, and openness — ideal for a platform asking billions of people to share their personal lives. The 2019 rebrand updated the blue to a more vivid, modern shade (#1877F2) to differentiate from competitors.