In Illinois it is a violation of the Illinois Human Rights Act to discrimination against an employee based on their color, ancestry or national origin. Many times a person being discriminated against will not know which of the three apply. There are many nuances to how a claim should be drafted to include all three. The reason for the care in drafting is to include all three claims so that the employer can't escape liability.
It is too bad that companies still have employee that are the victims of discrimination but it will only stop when the companies spend more money on training and properly screen employees. In Illinois the number of discrimination cases seems to be rising and the employees are currently under siege. It is very important to speak with an employment attorney to protect your rights.