Meanwhile, where Instagram’s icon is now filled with color, the app itself has had the color removed. Instead of using blue and white in the app’s chrome, the new black-and-white design allows ...

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.

Many Facebook users are confused, and a bit unhappy, after a technical issue caused their Facebook app icon mysteriously ... a blue "F" on a black tile rather than a white "F" on a blue tile.