Fiction written in the community based on one television series has been printed in pale blue ink on yellow paper, which photocopies as a blank page. Editors and authors would release the work only to people they knew, and then only after the purchaser had promised not to pass the work any further. Secondary readers - those known to the purchasers but not to the editors or writers - could be given the option to read the work in the home of the purchaser, but generally could not receive full access until they became well known in the fan group."
Camille Bacon-Smith, writing about pre-internet fanfic communities in her book Enterprising Women: Television Fandom and the Creation of Popular Myth
Let’s see if I can remember the fandoms that CBS is referencing
The first is….Starsky & Hutch RPS? (no, wait that was The Purple Pages) - named because they were printed on purple paper. There was a Starsky & Hutch gen and slash zine that was printed in blue ink on red paper: Pushing The Odds. You can see images of the zine here as well. So I am drawing a blank on the blue ink/yellow paper fandom.