Jeff54
Cruisin' on my Bluebird
Wishfull thinking but the paper is aged almost making it look copper like yours. .I got this from the Googlebooks website, from their on-line back issues of Boys' Life (Boy Scouts of America). Hopefully this is large enough to read the fine print. Interesting that this shows the color to be darker, even though it's supposed to be scanned from the same issue. I don't know where the variation comes from.
View attachment 1240844
IDK But maybe it's Donald duck yellow.. Here's another 1955 ad, yellow and blue;
Yet, I ran across this on ebay today and it sure looks yellowy gold: