My iPhone screen colors are only black and white
My screen lost all its color and is blac and white lost all its color what to do help me please
[Re-Titled by Moderator]
It sounds like you've toggled the Invert Colors Accessibility Option. It's designed to be useful for people with certain vision issues.
The fix should be easy. Check System Preferences -> Accessibility and toggle the 'Invert Colors' option to see if that helps.