Quote from: Tuxedo Mark on September 20, 2016, 05:52:37 PM
The story, "Color Coded", was my first Cheryl story, but I read it as a reprint in my first Archie digest in 1990. The story was also reprinted in one of the later "Cheryl Blossom Special" issues (albeit in slightly censored form) as a flashback. But where did the story first appear?
Possibly this issue of ARCHIE, from November 1983.

Comicbookdb.com says that this issue contains a story titled "Color Coded", and that both Cheryl and Jason Blossom appear in that story. Not having the comic myself, I can't confirm.