Quite right, HerenIstarion !!
"Green as a representation of evil? "
That idea would never have crossed my mind at all!
I've never heard that green is associated with jealousy and envy. In German the expression is "to turn
yellow with envy"!
And green is
the colour of hope! I believe this to be so in several other countries as well. (as I remember from the "Hope & Hopelessness" - Thread )
In Tolkien's works I think there are many
more examples that green signifies something good than something bad. I think he must have liked green very much, just as the Hobbits did.
Think of the Elfstone (Elessar) and its healing powers! It is green like the sunlight shining through the leaves of trees.
And Frodo's vision of the undying lands: "... a far green country under a swift sunrise"
(Does it surprise you if I tell you that green is my favourite colour?
)