If you activate the color reversal on the Huawei smartphone, all colors are inverted. That is, a white background with black letters becomes a black background with white letters. Media such as images or videos are also affected by the color reversal and may be displayed incorrectly.

Android 10 | EMUI 10.0
Step 1:  Open the  settings
Step 2:  Tap on  Accessibility features
Step 3:  Tap on  Accessibility
Step 4:  Activate or deactivate  Colour inversion
  1. Open the settings
  2. Tap on Accessibility features
  3. Tap on Accessibility
  4. Activate or deactivate Colour inversion

Huawei Instructions