Mica material - Windows apps | Microsoft Docs
Mica is an opaque, dynamic material that incorporates theme and desktop wallpaper to paint the background of long-lived windows such as apps and settings. You can apply Mica to your application backdrop to delight users and create visual hierarchy, aiding productivity, by increasing clarity about which window is in focus. Mica is specifically designed for app performance as it only samples the desktop wallpaper once to create its visualization.
XAML Controls Gallery If you have the XAML Controls Gallery app installed, click here to open the app and see Mica in action as the backdrop material.
Mica is a material that appears on the backdrop of your application — behind all other content. It is an opaque material that incorporates the user's theme and desktop wallpaper to create its highly personalized appearance. As the user moves the window across the screen, the Mica material dynamically adapts to create a rich visualization using the wallpaper underneath the application. In addition, the material helps users focus on the current task by falling back to a neutral color when the app is inactive.
We recommend you use and apply Mica as the base layer of your app, prioritizing application and visibility in the title bar area. For more specific layering guidance see Layering and Elevation and App layering with Mica.
