Legacy. Hermann Ebbinghausâ lasting contributions to the field of psychology are multiple. In addition to being the first psychologist to study areas of human learning and memory, Ebbinghaus contributed greatly to the establishment of experimental psychology.
This includes dimming the display slightly, stopping Mail push and fetch, turning off background app refresh, turning off Hey Siri, and a few other iOS features. By turning these features off, the battery life of the iPhone is extended dramatically, and when Low Power Mode is enabled the iPhone battery icon is yellow to demonstrate this.
The Settings menu background should then be black with white text. The inverted colors do not show up in a screenshot, however, which is why the screen is still the default color in the picture above. If your iPhone battery is depleting too quickly, then it might be worthwhile to try out Low-Power mode.