You are out of luck with the green, unless you want to build a test version. All operational aircraft are in shades of gray.
USAF CV-22A in dark over light grey. The USAF colors are AFSOC Gray (closest is Gunship Gray (FS36118) on top and Light Gray (FS36492) underneath.
USMC MV-22A in a similar dark over light grey. The USMC colors are Medium Gray (FS35237) on the upper surfaces and Light Ghost Gray (FS36375) on the sides and underside.