Iphone 13 sends a message, and the background color suddenly turns purple.

Apple 13 will suddenly turn to the background color because the phone has turned on the reverse color function, so it can be turned off directly. The specific method is as follows:

First, click the "Settings" icon on the iPhone desktop;

2. Then select the "General" option in the setting interface of the mobile phone;

Third, open the "auxiliary function" in the general interface to enter;

4. Click the "Display Adjustment" option after entering;

5. Finally, turn off the switch in the "reverse color" column.