How to find paint code for 1969 Road Runner

i believe adam he would be real close on this one here are 2
one is f6 bright green mettalic
and f3 i believe is light green mettalic
http://musclecarscene.com/for-sale/...1969-Dodge-Dart-340-4-Speed_250342004570.html

on this one in the middle of page is a F3 dart which looks like urs
http://www.andy440.com/69GTS.htm