I was flying around Winterspring the other day and there was something about the white snow, and the sparse colour that made it a rather pleasant and tranquil place to be. There is something about white in general that I've always liked - it gives off simplicity, elegance and a perhaps the lack of colour offers a pristine feel that a brightly coloured robe misses. Inspired by its simplicity, here is my collection of robes as white as snow.
The Mooncloth robe -- almost completely white save for a few blue accents here and there. It's an awesome robe and also happens to be the robe of Tyrande Whisperwind.