What color are taxiway markings primarily painted?

Answer: C — Yellow

Taxiway markings are primarily painted yellow to ensure maximum visibility and differentiation from other markings on the airfield. Yellow is chosen because it stands out against the natural environment as well as paved surfaces, making it easier for pilots and ground personnel to identify taxiways. This color coding is consistent with aviation safety standards that aim to enhance situational awareness during ground operations. While other colors like red, blue, and green are used for specific purposes in aviation—such as red for prohibited areas and blue for drainage—yellow is the universally accepted standard for indicating taxiways, as it facilitates safe maneuvering of aircraft on the ground. This adherence to color standards is critical in maintaining clarity and preventing accidents on the airfield.