Have a look at
https://www.rennbow.org/index.cfm?event=colorwiki.paintchips
Not sure if this applies to the 82s - is there a factory option sticker under the front lid or in the service book listing a paint code? Is there a point code listed on the window sticker?
The apparent disconnect between the car’s colour and the window sticker reminds me of a friend’s V6 Fiero factory order back in the day. He ordered a red car. The window sticker said it was red. But it was the most silver looking red either of us had ever seen. No-one sweats the details like GM.