These mods inject custom style sheets into the application, forcing the menu bars, right-click menus, and status bars to render in Hex code #1e1e1e (the standard Windows dark background). This creates the seamless integration that the official client lacks.
Because µTorrent development for the desktop client has slowed, many users have transitioned to open-source alternatives that offer robust, native dark mode support on Windows 11: utorrent dark mode windows 11 exclusive