What does legolas look like?

[Legolas]

His hair colour is not given. His father's hair was noted to be blonde in The Hobbit, so it's possible that he had golden hair also.

Ultimately, of course, the Elves shed all associations and qualities that would be now commonly considered 'fairylike', and those who remained in the Great Lands in Ages of the world at this time unconceived were to grow greatly in stature and in power: there was nothing filmy or transparent about the heroic or majestic Eldar of the Third Age of Middle-earth. Long afterwards my father would write, in a wrathful comment on a 'pretty' or 'ladylike' pictorial rendering of Legolas:
'He was tall as a young tree, lithe, immensely strong, able swiftly to draw a great war-bow and shoot down a Nazgul, endowed with the tremendous vitality of Elvish bodies, so hard and resistant to hurt that he went only in light shoes over rock or through snow, the most tireless of all the Fellowship.'

There was also a strange Elf clad in green and brown, Legolas, a messenger from his father, Thranduil, the King of the Elves of Northern Mirkwood.