Android will soon be able to theme every app icon, and Google Play won't let developers opt out

Developers must now agree to let their Android app icons be themed or they won't be allowed to distribute on the Google Play ...
Android Flagship

Themed app icons are going mandatory on Android

Google is turning Material You’s monochrome themed app icons from a nice-to-have into a requirement for Play developers. The change arrives via an update to the Google Play Developer Distribution ...