No paint codes on a Model A. Suggest you purchase a Refinishing Book from either MARC or MAFCA. The Refinishing book will tell you the colors used for each body style along with a color sample.
You can get some info just by googling. I went to a local PPG paint dealer with the color name and year, 1929 Ford Andalusite Blue, and they had a code and formula for it in the paint line I am using. No big problem.
I have an electronic copy of the paint code used on model A's. If no one post it here, I can sent it to you attached to an email. Send me an email if you want it.
Rusty Nelson