[fred cook]

The paint codes for 1980 models are:

Standard
guards red 027
talbot yellow 106
olive green 273
royal blue 305
chocolate brown 408
mocca black 451
cashmere beige 502
moonstone 601
black 700
grand prix white 908

Metallic
oak green 265
light green 275
light blue 30 T
minerva blue 304
petrol blue 376
copper brown 443
casablanca beige 463
tobacco 464
black 708
silver 936

This info is out of the Porsche factory shop manual volume IV. Hope this helps.