From the Q&A: "I want to use the image of an Elder Sign or the Yellow Sign in my work. Is this allowed?"
Posted by Michael O'Brien on 4th Jun 2022
From our Fan Use and Licensing Q&A:
Q: I want to use the image of an Elder Sign or the Yellow Sign in my work. Is this allowed?
A: Chaosium's Star Elder Sign and Yellow Sign designs are copyright to Chaosium, and cannot be used without permission*.
The "Star" Elder Sign is the Chaosium Arcane Symbol, created in 1983 for the second edition of the Call of Cthulhu roleplaying game and is © copyright 1983 Chaosium Inc. The Chaosium Yellow Sign was created by Kevin Ross and is © copyright 1989 Chaosium Inc. nb there are other versions of Lovecraftian elder signs available; these here are the ones that are Chaosium's IP.
The Yellow Sign as seen recently in HBO's '30 Coins'
*if you ask us, we're very likely to say yes.