Beginner's Questions

[SteamGene]

I think the GN Blue Sky color scheme came in the '70s or later.  The green and orange was '50s-'60s.  (I like GN, but I'm no expert on it.)
Gene

[Conrail Quality]

Big sky blue came out in 1967 along with a different, more stylized goat logo that replaced the classic 1936 red-and-black goat silhouette we typically associate with the GN. The Burlington Northern and its cascade green appeared in 1970.

Timothy