The Facebook mobile-app icon suddenly turned black and blue — from blue and white — for some users. Does this mark Facebook's new dark, edgy era? Nope, it's just a bug, according to Meta PR ...

The Facebook icon now is appearing as a black background with a blue "F," rather than the traditional white on blue, for some users.

While the Facebook icon isn't black for all users, many have observed that the app now appears with a black or dark blue background, with the "F" rendered in a lighter blue.