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Runway edge lights are white, transitioning to amber near the departure end of the runway. The ends, or thresholds, of the runways have green lights at the âbeginningâ of the runway, or approach end. The departure end is marked by red lights delineating the end of operational pavement.
In an additive set of colors, as in coincident projected lights or in electronic visual displays, the primary colors normally used are red, green and blue (but the precise visible light spectra for each color can vary significantly).