Do you have Facebook Messenger app? I'm sure you have it! are you also aware that your app now have dark Mode.
Dark mode is now generally adopted by developers, recently we learnt about YouTube receiving dark mode update which look so nice and cool even helps in saving battery and easy to use in the night.
Facebook has made this available to both Android and iOS users, if you'd like to use this then go settings by tapping your profile photo in the upper left corner and flipping the "Dark mode" toggle. This will switch the app's background from white to black, giving you lower brightness while maintaining contrast and vibrancy. Enabling dark mode could help to save some battery life on phones with OLED screens.
It's so great seeing this rolling out as seen in the picture above, I guess this is cool for those that love chatting in the night. Keep enjoying the latest roll out from Facebook.