This is a simple list of Caste colors.
Out of all the different Castes mentioned within the Books, only fifteen are shown to have a specific color or colors associated with their particular Caste.
First, the five High Castes:
Initiates White
Scribes Blue
Builders Yellow
Physicians Green
Warriors Red or Scarlet
And then, the other ten Castes:
Assassins Black
Bakers Yellow and Brown or Brown and Black
Metal Workers Black and Gray
Merchants Yellow and White or Gold and White
Peasants Gray, White or Brown
Players Red and Yellow checkered
Slavers Blue and Yellow
Sleen Trainers Black and Brown
Tarn Keepers Brown with Green streaks
Vintners White with Green cloth leaves
It also seems appropriate to mention the colors associated with the offices of the Administrator and Ubar:
Administrator Brown
Ubar Purple
Supporting References
Initiates:
I could see the white robes of Initiates and the variegated colors of soldiers, both of Ar and of Pa-Kur's horde.
Tarnsman of Gor Book 1 Page 204
I saw two Initiates in their snowy white, with their golden pans held out, to receive offerings.
Mariners of Gor Book 30 Page 504
Scribes:
another wore the blue of the Caste of Scribes,
Assassin of Gor Book 5 Page 3
"Where will he go? What will he do?" asked a fellow, a Scribe from his robes, of shoddy, faded blue.
Mariners of Gor Book 30 Page 4
Builders:
"That war can be ended here," smiled a man in yellow robes, those of the Builders.
Prize of Gor Book 27 Page 69
I saw two in the yellow of the Builders,
Mariners of Gor Book 30 Page 504
Physicians:
who wore the green robes of the Caste of Physicians,
Nomads of Gor Book 4 Page 44
On continental Gor, green is the caste color of the Physicians.
Mariners of Gor Book 30 Page 320
Warriors:
I was no longer worthy of the red of the warrior,
Raiders of Gor Book 6 Page 76
I now dressed myself in the scarlet garb of a warrior of Gor.
Outlaw of Gor Book 2 Page 24
Assassins:
It was as a warrior of Gor that I arose and donned the black helmet and the garments of the Caste of Assassins. I loosened my sword in its sheath, set my shield on my arm, and grasped my spear.
Tarnsman of Gor Book 1 Page 190
"Who are you," asked a man, "that those of the black caste would come secretly, silently, upon you?"
Mariners of Gor Book 30 Page 5
Bakers:
I stayed four days in the rooms above the shop of Dina of Turia. There I dyed my hair black and exchanged the robes of the merchant for the yellow and brown tunic of the Bakers, to which caste her father and two brothers had belonged.
Nomads of Gor Book 4 Page 237
I did note, however, the brown and black of the Bakers, the black and gray of the Metal Worker, the brown of the Peasants, and several others.
Mariners of Gor Book 30 Page 504
Metal Workers:
I did note, however, the brown and black of the Bakers, the black and gray of the Metal Worker, the brown of the Peasants, and several others.
Mariners of Gor Book 30 Page 504
Merchants:
In the crowd, too, I saw some merchants, though few of them, in their white and gold.
Marauders of Gor Book 9 Page 153
There were many caste colors in the crowd, but clearly predominating were the yellow and white, or white and gold, familiar to the Merchants.
Mariners of Gor Book 30 Page 503
Peasants:
one who wore the grimed gray of a peasant,
Magicians of Gor Book 25 Page 129
I wore a peasant's tunic. It was white and sleeveless, of the wool of the Hurt.
Slave Girl of Gor Book 11 Page 191
I did note, however, the brown and black of the Bakers, the black and gray of the Metal Worker, the brown of the Peasants, and several others.
Mariners of Gor Book 30 Page 504