redshift oneshot calls
The value is always relative to the current tempurature, with “current” = 6500K. Repeating calls like
redshift -O 5000 will continue to darken the screen.
redshift -x # redshift -O 1900K # redshift -O 3700K # redshift -O 5000K redshift -O 6500K # redshift -O 8500K
Supposedly using warmer temperatures will prevent eye strain. When setting it really low, I’ve found it only takes a few minutes to get used to a new color tempurature.