Everything that was black on my screen is now purple, what happened?

My screen was normal about an hour ago, the last time I used it was around an hour ago, I left it in the car and the weather wasnt too hot or too cold, I tried turning it off and back on, I tried restarting it, but nothing is working, a lot of stuff that was black is now purple on my screen, the notification screen is purple, the text isnt, please help me fix it