Now there's a solution. TCP Global (www.tcpglobal.com/autocolorlibrary/acl_files/Pontiac.html) offers free online paint chips and original Ditzler paint codes for Pontiacs, even all the way back to the 1930s.
The company's extensive reference library allows them to make you the 100% correct color for your Pontiac, the first time, every time and their technical manager, Jimmy "Chips" has over 50 years experience in the paint biz.
And, as another free service, TCP Global lets you send in a sample piece of your painted metal or trim, and they will match it up for you and return your piece to you (you pay shipping).
Paints come in lacquer (legal in all 50 states,) acrylic enamel, acrylic urethane, and base coat/clearcoat and include their excellent "Restoration Shop" line of paints and a complete line of PPG products. Try giving them a call at (858) 909-2150.