I tried to use Gnome Nightlight in Ubuntu 17.04. The settings only allow me to turn it on and adjust the time. Is it possible to adjust the intensity of the hue? Currently, it's a bit too much.
gsettings set org.gnome.settings-daemon.plugins.color night-light-temperature <temperature>
Here are some temperatures values I determined myself (probably not correct):
1000Lowest value (really red)
4000Default night light temperature
5500More pleasant and less intense night light temperature
6500Default temperature (night light off)
10000Highest value (really blue)
There's now a shell extension called "Night Light Slider" that works quite nicely: Night Light Slider gnome shell extension
In case you don't already have shell extensions running, here's a good overview of what to do: How do I install and manage GNOME Shell extensions?