For what it’s worth, I corresponded with the owner of Cornell over email and she indicated the repro they offer is just a replica of original scans sent in by a contributor without altering the coloring. So, there exists or existed a green version somewhere…

Just looked through my reproduction catalogs. I do not have that catalog as a repro.

A collection of repro, not the Winchester Repro, Parker Brothers catalogs is another interesting collection category. Of course, the Cornell repros are a bit expensive to accumulate.