I got the Paint Code information for you. The first number is the GM code, the second Numebr is the computer code that most of the paint shops will cross ref. from
Silver Fawn Metallic
GM-47 WA7134
Charcoal Gray
GM-98 WA8073
Canyon Blue (1960/61 factory GMC color)
GM-708A WE5799
Olympic White (also sometimes called Fleet White)
GM-14 W83E5111