Facebook Messenger testing dark mode, you might enable it by using an emoji

Not all users are able to trigger the dark theme yet, since the feature is apparently still under testing. According to some users on Reddit, Facebook Messenger has started testing the dark theme, and some users are able to activate the mode using a special emoji. While Facebook hasn’t officially said anything about testing the feature yet, per the Redditors, if you send a moon emoji on the Messenger in a chat, you may be able to trigger the theme. However, if you do want to give it a try, as soon as you send the moon emoji, if the trick does work for you, you will see a message pop-up at the top that reads “You Found Dark Mode!”. It is still unclear where all this feature is being tested, however, Reddit users from Philippines, Portugal, Czech Republic, Saudi Arabia, and Indonesia seems to be sending across affirmative response for this moon emoji trick.