There's also a category called pink collar.
Here are some definitions from:
http://en.wikipedia.org
A blue-collar worker is a working class employee who performs manual or technical labor, such as in a factory or in technical maintenance "trades," in contrast to a white-collar worker, who does non-manual work generally at a desk.
White-collar workers perform tasks which are less "laborious" yet often more highly paid than blue-collar workers, who do manual work. They are salaried professionals (such as some doctors or lawyers), as well as employees in administrative or clerical positions. In some studies, managers are considered as part of the white-collar worker grouping, in others they are not. The name derives from the traditional white, button down shirts worn by workers of such professions.
Blue collar workers did jobs which required them to get dirty and often put them in the way of
physical harm. White collar workers did jobs which were clean and safe, and thus often carried more
prestige than blue collar jobs. Pink collar is a recent third term in this categorization, used to describe service jobs that are performed in a clean, safe environment, but often for relatively low pay and prestige.
A pink-collar worker does work that is traditionally or most likely done by women, or work that is performed in an office-environment but does not require the professional training of white-collar work.
