here's what an original 911 RS in white/green looks like.
http://www.wwclassics.com/cars/1973_RS-RSR/1973_911_27RS_03.htm
there is also this original 911 color called emerald kelly green
http://www.wwclassics.com/cars/1972/1972_911_24T_02.htm
the pictures are not great, but you can an idea of the diff between the two.