Oppo mobile app icons are all black and white.

The following methods can be adopted: setting-display and brightness-eye protection at night-turning off black and white screen display.

In the auxiliary function in the settings, see if negative color or color inversion is turned on. If there is, turn it off to solve the problem. Click the button in Settings-Shop Assistant Function-Color Reversal. First, the replacement method of mobile phone font: in the mobile phone settings-display-font-online font or font type, select the appropriate font to replace.