I've seen "Green Envy" roses for sale, but I'm not into green flowers all that much so I skipped trying to remember which catalog they were in. Shouldn't be too hard to google for them.
, from Illinois!
I found a green mini rose at WM several years ago. It is a very pale green and almost looks white until you put something white next to it, and then you can see the green tinge. I like it and it has a nice fragrance, but I haven't a clue as to what kind of rose it is. I think that I would quickly tire of a bright green rose.
Good luck! They seem to breed everything nowadays!