The context shots above (first one, and third from the end) indicate to me that the combination of shades of the windows, spandrels, and mullions, do a reasonable job of emerald-ness, at least as one would expect it to be in the overcast lighting conditions. (And the mullions aren't even green.) Up close it's less convincing at this point, but it won't be until people have moved in and the curtains etc. are going in before we have a full revelation of the success of the choices, one way or the other.
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