I haven't figured out what this does. I would have thought it would invert bright whites to dark colours, but google-one of the worst night websites due to its blinding white seems to remain unchanged. I also have a feature request for the miui browser while on this topic: can the night mode setting make the LOADING and BLANK screens DARK? This would be refreshing because usually whenever you open, close, or load a new link the browser paints this eye bleach white before rendering the screen. Please make this an update for miui and the browser!!!!!! I'm sure others get headaches at night induced by Google and especially those blank white new pages and loading screens.