How many colours are there in the world that dark green would mean something different?
It is true to say a colour is open to interpretation.
Somewhere along the timeline, it was stated that apparently women can see more.
The truth of the matter is that only, He knows. You can not see through others eye, lest it is not the truth.
Is light the only colour in the worlds?
Or does the light allow you to see colours as result?
The reason mentioning dark green is because of trees and their leaves, how dark could a leaf actually be?
Some are to find out eventually.