White-Collar Worker – People who work in office and managerial jobs

To remember the definition of the phrase blue-collar worker, use the following mnemonic:

White-collared shirts (white-collar worker) are the only thing to wear if you work in the office. 

Here's another way to remember the difference between blue-collar and white-collar workers:

If your collars' blue you have to hew.
("Hew" means to use an axe, pick or other tool to chop or cut material such as wood and coal).

If your collars' white your work is light.
(That is, your work is not manual).

Examples of white-collar worker in a sentence

White-collar workers frequent this café before they start work in the morning. 

The white-collar worker quit his job to go and live in the countryside.

After finishing university the young accountant was the only white-collar worker in his family.