To invert screen colors (as shown in the following photo) in your iPhone or iPad for visual accessibility, you can refer to the guidance illustrated in this text.
Steps to invert screen colors in iPhone and iPad:
Step 1: Enter SettingsGeneralAccessibility.
Step 2: Tap the switch beside Invert Colors to enable it.
What's more, you can set up a shortcut for the Invert Colors option in this way: Access Settings > General > Accessibility > Accessibility Shortcut. Then you can tap the option Invert Colors. Finally click the Home button three times in fast speed to enable the Invert Color shortcut function.
