Didn't mean to rain on your parade. I thought you would want to know. I have no proof of a dark green.
Here is a picture from the USPC records. Note only a dark blue is shown. The green shown looks on the dark side to me. The records are notorious for being incomplete. There could be a half dozen more colors. I would bet that, being a generic, the chip was able to be ordered in a couple of dozen different colors. USPC did make lavender, purple, gray, lime green, mustard, etc.

Just page through my site and check the USPC colors -- there are many.