Where can I find an automatic day-night color balance adjuster similar to f.lux/Redshift that works with multiple monitors?

I had the same problem with -m vidmode but when I used -m randr instead, both monitor changed.

For example, I use:

gtk-redshift -l 49.2:-123.1 6500:3700 -b 0.7 -g 0.8 -m randr -v

I tried Redshift, and was able to get it to affect all monitors by running multiple instances targeting specific screens.

Basically I have something like this in a script:

#!/usr/bin/zsh

for i in {0..3} 
do
   redshift -m vidmode:screen=$i -t 5500:4000 &
done

There are probably much better ways to accomplish what I need to do, but this seems to work for now.

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