Invert colors is somewhat nice, but can present a lot of white when things would normally be dark, and affects pictures and videos as well, which makes somewhat strange when it comes to those.I configured my own dark mode on iOS. Simply set up triple click of the home button to turn on inverse screen colors under Assistive settings. I like it better than what my Android phones offer. On the modern iPhones it greatly reduces overall light output and makes reading at night much more relaxing.