White Collar Worker: is a salaried professional, refers to office workers and management in general sense.
Blue Collar Worker: This term is referred to a member of the working class, who performs manual labour and earns and hourly wage.
Light blue collar : Temporary workers (light blue = white + blue)
Open Collar Worker: Refers to a worker who works from home, via Internet.
Gold Collar Worker:  Refers to highly-skilled knowledgeable people such as doctors, lawyers, scientists and also young, low wage workers who also get parental support.
Gray Collar Worker: Refers to those who work beyond the age of retirement. For example, health care professionals, IT professionals.
Pink Collar Worker: refers to those workers who are employed in low-paid jobs like librarian, receptionist.
Green Collar Worker:  People employed in alternate energy sources like, World Wide Fund for nature, Greenpeace and Solar panels.

Orange collar :Prison workers
Scarlet Collar Worker: refers to people who work in the pornography industry.
Red collar : Farmers , (ALSO MEANS) Government Servants
Virtual collar : Robots performing manual repetitive tasks, both physical as well as virtual.

No collar : people who work, but not for Money.