I like Raygun Gothic/Atompunk, it's basically the 40s-60s idea of the future.
It may ring a bell once I show you this image I found on Google:
The Jetsons, Fallout and Thunderbirds could be considered Atompunk/Raygun Gothic, if you want more examples, visit r/Retrofuturism, it usually focuses more on Atompunk than any other retrofuturistic style.
retrofuturism
ˌrɛtrəʊˈfjuːtʃərɪz(ə)m/Submit
noun
noun: retro-futurism
the use of a style or aesthetic considered futuristic in an earlier era.