The system-wide appearance setting on Apple’s mobile operating system that alters the visual theme of the user interface, including the input method, to a darker color palette. For instance, activating this setting changes the on-screen keys from light grays and whites to darker grays and blacks.
Adopting a darker visual scheme offers several advantages. Reduced eye strain, particularly in low-light environments, is a primary benefit. Battery life can also be extended on devices with OLED displays, as less energy is required to illuminate darker pixels. Historically, this visual mode was introduced as an accessibility feature and has since become a popular aesthetic preference for many users.