The inspiration, “The Masque of the Red Death”, was read on PodCastle and can be found here
The Tor article that Alasdair mentions: https://www.tor.com/2019/11/13/the-things-we-do-for-course-credit-john-langans-technicolor/
by John Langan
Come on, say it out loud with me: “And Darkness and Decay and the Red Death held illimitable dominion over all.” Look at that sentence. Who says Edgar Allan Poe was a lousy stylist? Thirteen words—good number for a horror story, right? Although it’s not so much a story as a masque. Yes, it’s about a masque, but it is a masque, too. Of course, you all know what a masque is. If you didn’t, you looked it up in your dictionaries, because that’s what you do in a senior seminar. Anyone?