Toby. here's one of the reply's I got back from Matt.
Mike,
The interior is a medium gray. The buckles you sent me had covers that were a cream color, almost like a very dirty white. I showed them to my coworker who has owned and built several GN's and he immediately said they are not GN buckles. These are for my girlfriends fathers car. The previous owner replaced the carpet and forgot reinstall/include the buckles with the sale. The seat belt retractors are a silver/gray and did not match the buckles you sent.
Now him saying the interior is medium gray, I haven't got a clue what he really has and as far as his co worker that has owned and built several GN's I'd like to say I have been at this Buick game for 25 years and those female ends came out of a 84 GN that was actually a one owner car and I knew the people that bought it new right here in Spokane from Becker Buick and Iv'e also parted out several (like 11) of these cars and have seen my share of 84 GN's and they all have had what they call sand gray interiors which is actually a dirty light tan. Iv'e also restored , fixed and worked on my share of these things and Iv'e also seen the two colors of fabric in other seat belts. Matt ask your co worker what color a 84 GN should have ? Rather than get in a big pissing match over this I just told him to send them back and I'd give him a complete refund. I'm not saying he's wrong but from all my experiences all Iv'e ever seen in a 84-GN is the sand gray.