How to activate the hidden dark mode on Facebook Messenger
Facebook Messenger Dark Mode

Facebook has been working on a dark mode for Messenger, and it’s a true OLED black theme. It’s still hidden away right now, but ready to activate at any time using a peculiar trick. There are three step to activate this feature. One is easy and supported by Facebook, while the other is hard but should have a 100% success rate.

1. Send a Moon Emoji

This is so simple it’s silly: to enable dark mode, send someone a moon emoji. The regular, left-facing crescent moon icon as seen below, not any of the moon emojis with smiley faces.
If you’re lucky, moon emojis will rain down in the message thread, then a popup will appear at the top of the screen stating “You Found Dark Mode!” faucet this popup to show the feature on. If it didn’t work, move on to Step 2.

2. Force-Close Messenger & Tap the Moon Icon

If you didn’t get the Moonshower the first time you sent the moon emoji, you’re not completely out of luck yet. Start by closing the Facebook Messenger app by entering your phone’s multitasking UI, then swiping it away.

Now, open the app again, head to the conversation where you sent the moon emoji, then tap on the moon emoji. Some users have reported that double-tapping helps, so try both ways. Hopefully, moon emojis will start raining down when you do, at which point you’ll be able to tap “Turn On” when that “You Found Dark Mode” message pops up at the top of the thread.
If none of the fanfare happens, you still might have a chance. Fully close the app again, reopen it, tap and double tap the moon emoji you sent, then head back out to the main menu. From there, tap your profile icon (or silhouette) in the top-left corner, then scroll down and look for “Dark Mode.” It should be at the very top for most users but may be down in the Preferences section. Turn it on, then get ready to try out Dark Mode!
If Step 2 didn’t do it for you, there’s a good chance Facebook simply didn’t roll the feature out to your account yet. Nonetheless, there’s no harm in trying, so periodically repeat Step 2 and it should eventually kick in within the next few days.

3. Enjoy Dark Mode

Once enabled, it’s a true black dark mode, so you’ll save battery life on phones with OLED screens like the iPhone XR or Galaxy S10. The theme continues to be being worked on.

dark mode on Facebook Messenger

However, therefore you’ll notice many menus here and there wherever black text is overlaid on the black background. Still, it’s already very usable.