Which monks are called black and which are called white?

Monks are generally not referred to as either "black" or "white," as these terms are not typically used to describe religious orders.

However, the terms have been historically used to differentiate between two different types of Buddhist monks. Black-robed monks follow the Theravada tradition, which is the oldest branch of Buddhism and is found mainly in Southeast Asia. White-robed monks follow the Mahayana tradition, which is more widespread and found mainly in East Asia.

The color of the robes worn by Buddhist monks is typically determined by the tradition they follow, with Theravada monks wearing black robes and Mahayana monks wearing white robes. However, this is not a hard and fast rule, and some monks may choose to wear robes of different colors.