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The "blue collar" aspect of a "blue collar worker" may be a misnomer these days, since skilled laborers and union workers are not necessarily limited to blue work shirts anymore. The original work shirts created for the middle and lower class workforce were indeed blue, often to match the blue denim work pants and overalls favored by factory workers. White shirts would never survive the harsh conditions of a factory, so they were reserved for clerical workers seeking a professional appearance. Management and labor leaders often recognized their peers by the color of their shirts.

Over time, the term blue collar worker entered the public vernacular to represent the hardworking Everyman, a regular working class citizen who provided for his or her family. A blue collar worker is often viewed as having traditional values, a strong sense of patriotism and a solid work ethic. Many blue collar workers are either members of a labor union or strongly support worker's rights in non-union labor situations.

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