depend on how did you build themes. Cause this basically just change main theme on screen with your logo, which is showed to user while app is loading, after you need to change it, or to make sure that all your windows has a solid background.

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Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store