Press to toggle High Contrast Mode .
For users wanting a dark theme for media playback on Windows 10/11, the modern Media Player app (green icon) or VLC Media Player are better choices. Both support native dark themes. windows media player 12 dark theme
Windows Media Player 12 does have a native, built-in "Dark Mode" toggle in its settings Press to toggle High Contrast Mode
Windows Media Player 12 does not officially support themes for its , but you can subtly change its appearance by modifying the registry. windows media player 12 dark theme
: Open the new Media Player app > Settings (gear icon) > App theme > Dark .