Alatar and Pallando were the Blue Wizards.
It just means they wore sea-blue robes. There is a whole chapter in
Unfinished Tales about the five wizards. You can read more there - I encourage you to.
From
Unfinished Tales:
Quote:
The first to come was one of noble men and bearing, with raven hair, and a fair voice, and he was clad in white; great skill he had in works of hand, and he was regarded by well-nigh all, even by the Eldar, as the head of the Order. Others there were also: two clad in sea-blue, and one in earthen brown; and the last came one who seemed the least, less tall than the others, and in looks more aged, grey-haired and grey-clad, and leaning on a staff.
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White - Saruman
Grey - Gandalf
Brown - Radagast
Blue - Alatar and Pallando
[ January 05, 2003: Message edited by: Legalos ]