A "plain clothes" police officer will wear a headband, wristband or other piece of clothing in the "color of the day"; and officers will be told of this color at the police station before they start work. The system is for officer safety and first started during the violence of the 1970s and 1980s in New York City.. Color of the day (police) A New York City Police Department vehicle The color of the day is a signal used by undercover officers of some big city police departments in the USA. [1] It is used to identify undercover officers.
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It has many police and law enforcement officers such as; the NYPD, the (MTA) Police (that used to be called the Metro North Commuter Railroad Police), the Port Authority Police, the FBI, the Department of Homeland Security, the Drug Enforcement Administration, and U.S. Customs and others. The color of the day system is about officer safety.. An undercover police officer will wear a headband, wristband or other piece of clothing in the same color as the "color of the day"; this color is told to officers at the precinct before they start work. The system is for officer safety and first started during the violence of 1970s and 1980s New York City.