Probably not, but let me get to details;
Sometimes at night (well, nearly always) when I close my eyes green color is likely everywhere, when I open my eyes it's there also. (but disappears after a moment)
The question is - does green color means something?
If the room is lit up then it's normal.
Your mind is trying to correct the colour balance from your eyes.
It's a physical body attribute.
Normally with this you'd see red when you close your eyes.
Most other people see violet if dark. This is the flourescing colour of our air if lit up like a neon sign.
Green itself could have some more personal meaning.
It's a healing colour to me.
It's a significant chakra colour to those doing energy work.
The list continues....
It's dark, and I see green so I believe its more "personal". And when the room is list up i actually see violet, or something like that. :E