Buddhism has deeply influenced Asian cultures, with various branches, including Theravada, Mahayana, and Vajrayana. It spread widely due to royal patronage, particularly under Emperor Ashoka.
Asserting that Hindus and Buddhists are the branches of the same banyan tree ... and saints associated with Buddhism were present on the occasion.
Buddhist monks and nuns wear simple robes. The colour depends on the denomination or branch of Buddhism that they belong to but they're usually autumn colours: yellow, orange, brown, maroon.