USA TODAY Network journalist Ilana Keller reported seeing a black logo after downloading a Facebook app update on her iPhone, as well as iOS update 17.6.1. Keller's phone was not in dark mode.

Facebook logo in black. Users shared screenshots and photos of the Facebook logo shown on their smartphones and devices and wondered about the reason behind this sudden change.

An attached screenshot of the poster's home screen shows the Facebook logo sporting a blue "F" on a black tile rather than a white "F" on a blue tile. "Came here to see what others were saying.

FACEBOOK users have been left confused after the app’s icon mysteriously changed overnight – and some suspect it might be a bug. People woke up to a different logo for the social networ… ...

The Facebook app logo changed to black and blue for some users, but it's just a glitch. Digital Culture Tech Science Life Social Good Entertainment Deals Shopping Games Search ...

Facebook staff hail their subtle redesign of the site's logo as as 'electric and everlasting' - although you may not notice any difference.

Facebook says the logo change to the lowercase “f” is more visually accessible in the platform’s app with “stronger contrast for the ’f’ to stand apart”.

FACEBOOK users have been left confused after the app’s icon mysteriously changed overnight – and some suspect it might be a bug. People woke up to a different logo for the social networ… ...