A lot of guitars were painted with DuPont automotive paint back in the 50s, so if you want to know what the popular car colors were you could go check Fender, Gibson, and Gretsch's custom paint jobs from that era.

Obviously it won't give you the kind of data from this chart, but I like to shoehorn that little bit of trivia wherever I can. My buddy has a gorgeous surf green telecaster that is exactly the same color as the Chevy Bel Air (minus the rust spots and poorly maintained interior) he used to drive back in high school 25 years ago.