It switches the colours of your screens, to give everything a black or dark background with white text and objects. You can use it on your phone or computer, on just specific apps or across a ...

That left my Facebook icon with the dark background after the app update. My phone was not in dark mode. The iOS update to 17.6.1 also was available for my phone, which I also installed.

Other apps — including the New York Times, the RealReal shopping app and the dating app Hinge — take the opposite tack with black text on a white background.

A black background is better than a white background for your phone's battery, though admittedly you'd have to use Messenger a lot to notice it. Dark themes on mobiles are all the rage these days.

How to Change the Background Color of a Specific Note on iPhone and iPad Launch the Notes app on your iOS device. Create a note and start typing your note, or select an existing one from the list.