Like flux/windows night mode, color temperature apps/settings exist.
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I've tried using Flux to alter the color temperature, but it doesn't seem to work on my current version. Is there a package option to change the color temperature? I found a few choices that work on Ubuntu, but I'm not sure whether one will also work on Debian. Debian GNU/Linux 9 is the operating system (stretch) Linux 4.9.0-9-amd64 kernel x86-64 architecture