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Redshift is primarily distributed for and used on the Linux operating system.. Redshift can be used to set a single color temperature and brightness ("one-shot mode") or can adjust the temperature and brightness continuously to follow the Sun's elevation, in which case it will transition to the night color temperature settings near twilight.
A screen in F.lux's "darkroom mode" On installation, the user can choose a location based on geographic coordinates, a ZIP code, or the name of a location.The program then automatically calibrates the device display's color temperature to account for time of day, based on sunrise and sunset at the chosen location.
Saturation is the "colorfulness of an area judged in proportion to its brightness", [6] [2] which in effect is the perceived freedom from whitishness of the light coming from the area. An object with a given spectral reflectance exhibits approximately constant saturation for all levels of illumination, unless the brightness is very high. [7]