From the Q&A: "I want to use the image of an Elder Sign or the Yellow Sign in my work. Is this allowed?"

[MOB]

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.