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light-dark-cli-win11 is a tiny open-source utility published by developer tompscanlan that gives Windows 11 users an immediate command-line method for switching the system-wide color scheme. Instead of navigating through Settings > Personalization > Colors, a single typed instruction flips the interface between light and dark modes, making the tool convenient for automated scripts, scheduled tasks, or quick manual changes. Released in a single version 0.1.3, the program is distributed as a portable executable that requires no installation and consumes negligible disk space; it simply toggles the OS registry value responsible for the default app mode and exits. Because the switch is applied at the system level, every UWP and Win32 application that respects Windows 11’s built-in theme preference follows the change instantly, providing a consistent visual experience across the taskbar, File Explorer, Settings panels, and Office or Edge windows. Developers frequently embed the command in batch files that run at logon to synchronize the desktop with ambient light sensors, while office workers pair it with Task Scheduler to darken the screen automatically in the evening and return to light mode in the morning. The utility is also handy for presenters who need a bright background during daytime meetings and a subdued palette later in the day, all without opening a GUI. As a narrowly focused system tweaker it belongs to the OS customization category, complementing larger theme managers by offering the fastest possible route to a binary light-or-dark decision. The software is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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