Aircraft lead-in lines are colored how?

• A. White with a black border.
• B. Yellow with a black border outline.
• C. Blue with a yellow border.
• D. Red with a white border.

Answer: (B)

Lead-in lines are the path that guides an aircraft from a taxiway onto a ramp or stand, so they must be highly visible and easy to follow in all conditions. The standard color is yellow with a black border. The yellow base provides strong contrast against the apron’s concrete or asphalt, helping pilots see the line clearly. The black border sharpens the line’s edge, making it stand out more distinctly, which helps in low light, glare, or worn surfaces and reduces the chance of mistaken alignment. Other color schemes would either blend with surrounding markings or fail to provide the same level of edge definition and visibility, so they aren’t used for this purpose.