I know what you mean... I realized about 20 colors in that I seemed to have a different name for each incarnation of blue, but all shades of green were just "green" to me.
It did require some imagination. I ended up putting in "vomit green" for one, and "mango" for another.
Right, I think that is part of the survey, to come up with interesting names. Some of the saturated ones are extremely hard to name.
I stopped after I realized I could just as well have answered "I don't know" for 70% of them.