In Buddhism, yellow is has the highest symbolic value in Buddhism through its link with the saffron robes of monks.
This color, previously worn by criminals, was chosen by Gautam Buddha as a symbol of his humility and separation from materialist society. It thus signifies renunciation, desirelessness, and humility.
Yellow is the color of earth, and thus a symbol of rootedness and the equanimity of the earth.Source
- Article by Nitin Kumar of Exotic India. Reprinted by permission.