https://www.eeoc.gov/racecolor-discrimination

Race/Color Discrimination & Employment Policies/Practices

An employment policy or practice that applies to everyone, regardless of race or color, can be illegal if it has a negative impact on the employment of people of a particular race or color and is not job-related and necessary to the operation of the business. For example, a "no-beard" employment policy that applies to all workers without regard to race or national origin may still be unlawful. If a "no-beard" policy is not related to the job and in effect disproportionately harms employment opportunities based on race or national origin, the policy is unlawful.