The usual assumption in life is that when I say the word green as a descriptor, the person to whom I am speaking knows what green is. If we were both looking at the image above, we would both know.
If you think about it, though, there are an awful lot of greens, no? An artist I know told me once that there are more shades of green than of any other color!
Do I mean: grass green? Emerald green? Avocado green? Celadon green? Forest green? Stoplight green? (Or would that be, Golight?) Green going toward yellow? Or green going toward turquoise? It’s a lot to think about!