Now I see it , best guess it's a darker "gold" color than the interior. I don't have any sheets from '73 cars with gold interiors, but I found a couple of '74s.

In '74 the a-bodies used Y7 carpets in "gold" interiored cars, but the b-bodies used L7 carpets in "gold" interiored cars. (the "L" colored interiors were refered to as "parchment" & basically look dirty-white) So, if you are looking for a color match (start another thread asking for carpet pics of '73 Bs and or '73-'74 As with "gold" interiors - since thisa thread is getting lots of action ).