gammastep
Adjust the screen's color temperature according to the time of day.
TLDR
Turn on Gammastep with a specific [t]emperature during the day (e.g. 5700k) and at night (e.g. 3600k)
$ gammastep -t [5700]:[3600]
Turn on Gammastep with a manually specified custom [l]ocation
$ gammastep -l [latitude]:[longitude]
Turn on Gammastep with a specific screen [b]rightness during the day (e.g. 70%) and at night (e.g. 40%), with minimum brightness 10% and maximum brightness 100%
$ gammastep -b [0.7]:[0.4]
Turn on Gammastep with custom [g]amma levels (between 0 and 1)
$ gammastep -g [red]:[green]:[blue]
Turn on Gammastep with a c[O]nstant unchanging color temperature
$ gammastep -O [temperature]
Reset temperature adjustments applied by Gammastep
$ gammastep -x
