Describe the bug
With XDG_CONFIG_HOME set to something other than $HOME/.config, the supplied apparmor profile DENIES the file access to the redshift.conf file. Adding the line:
owner @{XDG_CONFIG_HOME}/redshift/redshift.conf r,
to the usr.bin.redshift file fixes this when running redshift from the command line. It does not fix it when running redshift-gtk however.

• [I have check

I would like to be able to use civil, nautical or astronomical dawn/dusk times, and not only sunrise/sunset times, to disable/enable the Red Moon filter.

Especially because the transition is not progressive at the moment, it would be particularly interesting to keep the screen unfiltered up to the nautical dusk ("sunset") time for example. Because natural light is usually still strong right af

I like your theme very much, but I can’t solve this problem independently.

This is the demo from your Repository:

Here is mine: