Which color is used for the navigation light on the left wing?

The color used for the navigation light on the left wing of an aircraft is red. This color coding is part of the International Civil Aviation Organization (ICAO) standards, which dictate that navigation lights serve specific purposes to enhance visibility and safety during flight operations, particularly at night or in low-visibility conditions.

The red light on the left wing, along with a green light on the right wing, helps to indicate the orientation of the aircraft to other pilots and ground personnel. This system of color coding allows for quick recognition of the aircraft's direction; if a pilot sees a red light, they can immediately understand that the aircraft is flying toward them from the left side. The use of these specific colors enhances situational awareness among pilots and contributes to the overall safety of flight operations.