Dark mode is a user interfaces (UI) for content that displays light text on a dark background. Dark mode is especially helpful for those viewing mobile computing device screens at night. The reduced brightness can reduce eye strain in low light conditions. Dark mode can also be used as a courtesy in situations when a screen's bright light might annoy others.

(Quelle: https://whatis.techtarget.com/definition/dark-mode, Einsichtsdaum: 22.11.2019)