The ink screen you say is a black and white screen, and the setting steps are as follows
OPPO mobile phone black and white screen how to set:
1, open the OPPO mobile desktop, find the setting option;
2, click \"Settings - Display and brightness\";
3, in the \"night eye protection\" select \"screen black and white display\"
How to close the black and white screen of OPPO mobile phone:
1. Open the OPPO mobile desktop;
2, click \"Settings - Display and brightness\";
3. Select \"Color screen display\" in \"Night Eye Care\".