redshift -l LAT:LON -t DAY:NIGHT [OPTIONS...]


Redshift adjusts the color temperature of your screen according to your surroundings. This may help your eyes hurt less if you are working in front of the screen at night.


Display this help message


Verbose output


Show program version

-b N

Screen brightness to apply (max is 1.0)


Load settings from specified configuration file

-g R:G:B

Additional gamma correction to apply


Your current location


Select provider for automatic location updates (Type `list' to see available providers)


Method to use to set color temperature (Type `list' to see available methods)


One shot mode (do not continuously adjust color temperature)


One shot manual mode (set color temperature)


Reset mode (remove adjustment from screen)


Disable temperature transitions


Color temperature to set at daytime/night

The neutral temperature is 6500K. Using this value will not change the color temperature of the display. Setting the color temperature to a value higher than this results in more blue light, and setting a lower value will result in more red light.

Default values:

  • Daytime temperature: 5500K Night temperature: 3700K

Please report bugs to <>

RELATED TO redshift-gtk…

The full documentation for redshift is maintained as a Texinfo manual. If the info and redshift programs are properly installed at your site, the command

  • info redshift

should give you access to the complete manual.


redshift was written by Martin Koelewijn and Jon Lund Steffensen.

This manual page was created by Franziska Lichtblau <[email protected]> for the Debian project (and may be used by others).