Bill Hirsch lists a lot of Mercury variations of the name Green. But there is also a "Mercury Green". Too bad they dont show any colors. I know when i went to their warehouse in Newark they had a paint samples there.
My engine, a 52 truck engine, I used this enamel I really like it brushes out very well. I used Lincoln Mercury Light Green. Which is close to Alpine Green but Alpine is more blue more minty, than the Lin.Merc Lt Green was a more yellowish green for sure.
https://www.hirschauto.com/ENGINE-ENAMEL/productinfo/EE-QUART/