Simple shell utility to control the macOS Night Shift feature introduced in 10.12.4.
Usage is nshift strength where strength is a value from 0 to 100. A higher value shifts the color temperature of the display to more warm. A value of 0 disables Night Shift altogether.
Additional ways to use it are nshift on, nshift off, which do the obvious thing–turn NightShift on/off.
There is also nshift reset, TL;DR: It turns NightShift on and off again. This helps fixing some external displays which are somehow stuck on a warmer color tone after waking a Macbook from sleep, despite actually not working with NightShift in the first place. (Actually, the external display only reacts to NightShift being turned off, but never to being turned on. I don't know, don't ask.)