Why does my screen have negative colors?
One day the colors on the screen of my Iconica B1 A71 turned negative. There are no settings to change this on the current version of android for this device (4.1.2).
Usually it is in Settings --> Accessibility --> Display --> Negative Colors.
If that doesn't work, enable Developer options.
1) Go To Settings --> About --> Tab "Build Options" 7 times until it says you activated developer mode
2) Go back one screen, you should see a new "developer options" screen
3) scroll down to color space and play with the settings there.
If either of these don't work, try a factory reset.
On my LG Stylo 3 android phone went to Accessibility-->Vision-->Screen Color Inversion is set to OFF