appear cleaner. For the same reason, blue is a popular color for boilersuits which protect workers' clothing. Some blue collar workers have uniforms with the name of the business or the individual's name embroidered or printed on it.

Historically, the popularity of the colour blue among manual labourers contrasts with the popularity of white dress shirts worn by people in office environments. The blue collar/white collar colour scheme has socio-economic class connotations.