What color are taxiway lights that outline the edge of taxiways?

Taxiway lights that outline the edge of taxiways are blue. The purpose of these blue lights is to provide clear guidance for pilots and ground vehicles as they navigate along taxiways, helping them to understand where the taxiway edges are and ensuring safe movement on the airfield. This specific color coding is standardized in aviation to avoid confusion, as different colors serve distinct purposes in airfield lighting. Green lights, for example, are used for runway edges, while red lights indicate the boundaries of prohibited areas or the edges of runways. Yellow lights are often used for centerlines or informational purposes, but blue lights specifically serve the function of marking taxiway edges.