Goldberry's dress and the cape worn by Arwen at the wedding, at least. Those
are the only two examples I can think of off hand. Yes, it's one of the less
common colours I guess. Isn't blue associated with Manwe also? And the two
mysterious Istari are blue of course... but then they are hardly main
characters.
Black is found in a positive connection in the uniforms and standards of
Gondor, and black hair is often considered particularly beautiful I think,
Luthien and Arwen being the best examples. I wonder if the black colour in the
Gondorian uniforms signals power and austerity, the way gold seems to also
signal power both in a positive and negative
context?
A Túrin Turambar turún' ambartanen
-Master of doom by doom mastered