That's what Fero is saying - this SS's forearms don't look blue in the pic. And he is a little off - like, the intakes are just poking out from behind the shoulders without any of the normal accompanying red.G1 Starscream's forearms have always been blue.
I found this page from the comic and he looks more normal. That cover art is a strange design (which is not uncommon for cover art I suppose).