Very interesting. As far as "by-eye vs. by-ref" we'll have to make do with what we have - I'm going to be working on making the references available, which actually leads to my next question - if I used a grey card, possibly scanned in with the film/cels/other material, would it make the colors somewhat accurate, or would we just be comparing one scanned-in, incorrect color source with another?

As far as a list, no, we do not have a list (as we don't know where to start). What would you suggest.

Also, thanks for contributing, especially on the open forum like this. I hope that this project will be out in the open so that others can duplicate the methods we come up with.