This is the only official way to make your desktop and windows dark without installing extra software, though it significantly changes the look of icons and text.
Right-click the desktop > and select your new dark theme. Dark Mode for Desktop Applications dark theme for windows 81
Switch to Dark Mode without Windows activation - XMG Help Center This is the only official way to make
Switch to Dark Mode without Windows activation - XMG Help Center "Window Text" to white
You can tweak the colors by clicking (the link below the theme dropdown). Change "Window Background" to black, "Window Text" to white, etc. This is the most stable, crash-free method, but it is a "brute force" dark mode—not elegant.