A 98.3 m (323 ft) monitoring tower stands at the southern end of T3, the highest building at the airport. The roof of T3 is red, the Chinese color for good luck. The terminal's ceilings use white strips for decoration and to indicate directions. Under the white strips, the basic color of the ceiling is orange with light to dark tones indicating where a passenger is inside the building. It is light orange in the center and deepens as it extends to the sides in T3E and is the other way around in T3C.