Basic Caste Information

Caste colors & appearance
Green
Often good manual dexterity
Smooth Shaven

"These tiers shared the color of that portion of the wall behind them, the caste colors.The tier nearest the floor, which denoted some preferential status, the white tier, was occupied by the Initiates, Interpreters of the Will of the Priest Kings. In order, the ascending tiers; blue, yellow, green and red were occupied by representatives of the Scribes, Builders, Physicians, and Warriors."
Tarnsman

“He is a member of the Caste of Physicians,” said Kusk, “and his manual dexterity is superior even to that of Priest-Kings.”
“Of what city?” I asked.
Parp looked at me closely. “Treve,” he said.
Priest-Kings

Two smiths were in the room. There was a guard talking with the smiths. There was also a man in the green of the Caste of Physicians, standing at one side, writing notes on a slip of record paper. He was a large man, smooth-shaven.
Assassin