Android - Is there an easy way to invert colors?
Since Android 5.0 Lollipop, the feature is built-in as one of accessibility options.
- Open Settings
- Select Accessibility
- Below Display section, toggle Color inversion.
After toggling it for the first time, the "Invert colors" toggle will be added to the quick settings menu.
It's not a built-in feature on Nexus devices, but Samsung devices have this in the accessibility settings.
Inverting all colours isn't much use, as some apps have light text on a dark background, and some apps have dark text on a light background. Making text easier to read is better achieved by increasing the text size, which is an option on all Android devices (also in the accessibility settings).