Color inversion predates settings like Dark Mode as an accessibility feature to make some texts and images easier to see on the screen of your phone. Though most phones now have Dark Mode in some form ...
Apple has always made the iPhone's display user friendly. Depending upon your specific sight needs, you can invert the colors on the phone – making it easier to read the screen if you have low vision ...
If you prefer viewing items against a dark background, you can use the Invert Colors accessibility feature to change how content is displayed on your iPhone. This feature may also be useful to users ...