Yes, the plastics are pigmented, some components in some other make/model cars were also painted and there would be a paint code to match each plastic colour. Looks like I will have to eyeball it and find something close. thanks for the replies and help. I've always liked these cars, I didnt know they had such a fan base.I believe the interior plastics is the factory dyed grey, and isnt exactly a "colour", and the trim code on the firewall is what level of trim and if its painted ("painted" meaning factory plastics dyed black).
Its dyed, because if it was factory painted you would see it chip off and have other colours under the paint. On that same note, if you repaint it, you need to do a proper job of it, as it can chip and you'll see the faded grey under it