Oppo
Turn Eye Comfort On or Off auf Oppo
Cool white light from an OLED or LCD panel keeps your eyes more alert, which is fine during the day but disruptive after sunset. Oppo's Eye comfort feature, the ColorOS name for a blue light filter, shifts the display toward warmer tones and lets you dial in how strong that shift should be.
You control it under Settings ➔ Display & brightness ➔ Eye comfort. Toggling the switch there enables or disables the filter immediately, and a slider on the same screen sets the color intensity from a light tint to a strong amber cast.
Automatic schedule
Instead of switching it manually every evening, you can set a fixed time range or let the filter follow sunset and sunrise. Once scheduled, ColorOS turns Eye comfort on and off without any further input from you.
Eye comfort is not the same as Dark mode. Dark mode changes background and text colors to reduce overall brightness, while Eye comfort only filters color temperature and keeps the interface layout unchanged. If you edit photos or check color-accurate content, turn Eye comfort off first, since the warm tint distorts how colors actually look on screen.