Yes I would say hunter green is very close. I restored a very early Lauson a couple years ago and wanted the paint perfect. So I took the intake tube which had some very good original paint into an auto parts store and they found a very good match. It is very close to rustoleum hunter green.
I researched the exact paint color 10 years ago when I restored my Lauson P-25. The color is Spectramaster Green, GS908A enamel, manufacturer is Centari. I had an auto paint supplier order the paint for me and put into aerosol spray cans.