Now, it's back to the Shortcuts app again, to create the home screen shortcut for the new dark icon. Here, tap the Plus icon from the top to create a new shortcut and choose Open App as the action.

After tweaking the shortcut to your liking, hit Add to make it part of your home screen. The original app icon will still be there, but you can hide it from the home screen to avoid confusion.

With a bit of luck, your custom dark mode icon will look the part on your personalized Home Screen. Note: If you have several app icons that you want to create dark mode equivalents for, make sure ...

Launch the Shortcuts app on your iPhone or iPad, then tap the + icon in the top-right corner of the screen. Tap Add Action, then use the text field to search for Open App. Select Open App. Tap App.