As far back as I can recall (mid-70's), the Blue Streak structure has always been light blue. Up until the early/mid 80's (when they unveiled the ultra cool logo of today), the structure was light blue and the track, handrails, and walkway was white, along with 2 blue trains with a white stripe (though at one time, there was a red train and blue train). When they unvelied the new logo, they changed the color of the track, handrail, and structure to dark blue with blue trains with 2 orange and white stripes, finally reducing the train to one orange and white stripe. Anyone recall further back?
Idora Wildcat