Have you looked at
redshift? Although designed for a different purpose, it does have features for setting the colour temperature of your screen.
sudo apt-get install redshift
This is my config file ~/.config/redshift.conf:
redshift modifies the colour temperature by the time-of-day. If you set temp-day and temp-night to the same colour, you disable this feature. Perhaps that solution will work for you.
If you do want the colour temperature to change at night, you would obviously need to change lat/long.
If you want
redshift to autostart at login, select Applications/System tools/Preferences/Startup applications/Add. Name: redshift. Command: /usr/bin/redshift.