The traditional Chinese character for Cang: Cang
Cang cāng?
Interpretation
①Dark green, cyan: Cang pine (green pine); Cangshan (green mountain); Cangmo (green moss); Cangtou (oldly refers to servants. In the Han Dynasty, slaves all wore dark blue scarves to wrap their heads)
②Dark blue: blue sky.
③Gray, also refers to the elderly: pale face; gray hair; dusty face, gray temples and black fingers.
④ Surname
The original meaning is grass color. Same original meaning, extended to blue-black.