Apparently invert colour in iphones or android do not have much of an use. Inverting the colour makes most things look weird and ghastly. Never even think about browsing the gallery in inverted mode. read more
To do this, look for the Accessibility section in your phone's settings. On the iPhone, set the triple-click setting to"Invert Colors." On Android, select"Inverted Rendering." Then you'll be able to text or email in the dark without drawing everyone else's attention. read more