The dominant colors of the Forbidden City—Yellow and Red—are not just for aesthetic appeal; they are loaded with political and philosophical meaning.
Yellow: The Emperor's Color
Representing the element of Earth at the center of the universe, yellow was the exclusive color of the Emperor. Most roofs are covered in yellow glazed tiles.
Red: Good Fortune
The walls are painted "imperial red," symbolizing wealth, happiness, and fire. In the Five Elements theory, fire produces earth (yellow), reinforcing the structure's stability.
Exception: The library (Pavilion of Literary Profundity) has a black roof, as black represents water, which provides protection against fire for the precious books inside.