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Re:Ask HN: What device do you use to read academic papers with? by TheCowboy on Tuesday February 07, 2017 @09:48AM (#13589673)
What is Redshift? (Tried Googling it.)
Re:Ask HN: What device do you use to read academic papers with? by JD557 on Tuesday February 07, 2017 @10:26AM (#13589919)
http://jonls.dk/redshift/

(If you know f.lux, it's an open source version of that)