None achieved a complete, stable dark UI across all WMP12 views without breaking functionality.
If you are using the modern "Media Player" app (the successor to Groove Music and the legacy WMP), it support a native dark theme: Media Player (Settings) in the bottom-left corner. Personalization 2. Custom Skins (Legacy WMP 12) windows media player 12 dark theme
: Fans created unofficial skins to mimic a dark aesthetic, though these often broke with Windows updates. None achieved a complete, stable dark UI across
This is a true dark theme for the UI, but it ruins images and video playback. Only use this for audio-only listening. None achieved a complete
By default, WMP12 opens in "Library Mode," which forces a white background. The trick is to switch to .