Color (law)
In United States law, the term color of law denotes the "mere semblance of legal right", the "pretense or appearance of" right; hence, an action done under color of law colors (adjusts) the law to the circumstance, yet said apparently legal action contravenes the law.Under color of authority is a legal phrase used in the US indicating that a person is claiming or implying the acts he or she is committing are related to and legitimized by his or her role as an agent of governmental power, especially if the acts are unlawful.
Color of law
Color of law refers to an appearance of legal power to act but which may operate in violation of law. For example, though a police officer acts with the "color of law" authority to arrest someone, if such an arrest is made without probable cause the arrest may actually be in violation of law. In other words, just because something is done with the "color of law" does not mean that the action was lawful. When police act outside their lawful authority and violate the civil rights of a citizen, the FBI is tasked with investigating.