Gammastep

Gammastep is a program that adjusts the color temperature of your screen according to your surroundings. By reducing the amount of blue light emitted it may help to reduce strain on the eyes if working in front of the screen at night.

Installation

Using Home Manager Gammastep can be enabled for a specific user with the following syntax

home-manager.users.myUser = {
  services.gammastep = {
    enable = true;
    provider = "manual";
    latitude = 49.0;
    longitude = 8.4;
  };
};

To properly work, Gammastep needs your location to know when the sun will be setting and it gets dark outside, so that it can automatically adjust your screen temperature accordingly. Replace myUser with your user name running the graphical session and latitude and longitude with your geographical position.

See also

• Redshift, alternative implementation supporting X-server compositors