Citrus Green was one of the Spring 70 colors...along with Sunflower Yellow and Hugger Orange. (was there another color??) The car in the photo had some cosmetic work done...note the non-SS style headlight bezels. Common mistake for most garden variety restos...they should be blacked out to match the SS grille. I do like that color on a Nova...in fact a friend of mine may have owned that very car...
wilma