Did Chevy make a blue 350 small block?

Chevrolet didn't offer a specific "blue" paint color *exclusively* for their 350 small-block engines. The engine blocks themselves were typically cast iron, which is a dark grey. However, Chevy engines could have been painted blue after they left the factory, either by the vehicle manufacturer as part of a special edition or during aftermarket modifications. So, while not a factory color, a blue-painted 350 small block is certainly possible.