How can I make monochrome icons work?

1. What is a monochrome icon?
2. How do I change the background color of an icon on Android?

What is a monochrome icon?

Monochrome icons at both sizes are used to represent small file types and entries in the Places panel in Dolphin and file dialogs. Don't use the monochrome style for larger icon sizes. The Monochrome style is used for Action , Status, small Places, and small MIME type icons.

How do I change the background color of an icon on Android?

If you want the app icon colors to be balanced against the wallpaper, open Settings > Wallpaper & style > Wallpaper colors and pick one of those color combinations (the combos you see there change depending on the wallpaper you're using).