My trolling for "PSE Green" suggestions obviously failed :)
The only suggestion regarding PSE Green I can come up with is to contactWarren Wing. He lives just south of Seattle in Allentown and has a huge
collection of Pacific Northwest railroading photos. He has published at
least three books from his photo collection that I'm aware of. He may
have a website--- I don't know his phone number. But I would think if
anyone has a photo or can describe the shade of green used by PSE, it
would be Warren. He's getting up there in years but the last I heard he
was living in the same house he was in when we interviewed him several
years ago.
(to reply remove Boeing jet from address)
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C. Marin Faure
Seattle, Washington