i have no idea if they were ever a true blue, but the metal not exposed to the elements looks pretty dark blue, almost black.
my dad told me he did a quick cold bluing on those guys years ago. he had left them out in his old, uninsulated shop for years.... like about 40 years. so i want to do some cleaning and maintainence before they are unsalvageable. the rust isn't pitting the metal, its just ugly.