When did the term 'blue collar' come into use for manual labor jobs? What made it become associated with that color of clothing? - Quora
When did the term 'blue collar' come into use for manual labor jobs? What made it become associated with that color of clothing? - Quora
![Idioms & phrases meaning with origin|blue collar worker,between the devil and the deep blue sea - YouTube Idioms & phrases meaning with origin|blue collar worker,between the devil and the deep blue sea - YouTube](https://i.ytimg.com/vi/VcQZRHlFrxo/sddefault.jpg)