One of the biggest new features of elementary OS 6 “Odin” is the highly and long-anticipated Dark Style or Dark Mode, finally allowing you to turn down the lights on your elementary OS desktop. And, the devs made it super easy to enable, right from the Welcome screen (on new installations) or from System Settings > Desktop > Appearance.
If you thought elementary OS was beautiful before, wait until you enable the Dark Style, which can be complemented with 10 new accent colors that are applied to the entire system. Of course, the Light Style is also there, and you can control whether Dark Style is permanent or only from sunset to sunrise.