I'm not sure where you are but here in southern Manitoba we can go to Rondex with a small painted part (such as a gas cap) and they scan it to get the colour, then mix you a spray bomb.
Plan B, there is a paint chart that has the mixing code on it. I posted the link a while back. It may be in the library here.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Just so you know, the J paint code is for Verde Green. For 1967 in Canada it was used on many Canadian GM cars and divisions, but if you are trying to source that colour from a U.S. site you need to be aware that in the U.S. it was exclusively used in 1967 on Buicks and the Oldmobile Toronado.
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67 Chevelle Malibu Sport Coupe, Oshawa-built 250 PG never disturbed.
In garage, 296 cid inline six & TH350...
Cam, Toronto.
I don't judge a man by how far he's fallen, but by how far back he bounces - Patton