"Radagast the Brown!" laughed Saruman, and he no longer concealed his scorn. "Radagast the bird-tamer! Radagast the Simple! Radagast the Fool! Yet he had just the wit to play the part I set him. For you have come, and that was all the purpose of my message. And here you will stay, Gandalf the Grey, and rest from journeys. For I am Saruman the Wise, Saruman the Ring-maker, Saruman of Many Colours!"
I looked then and saw that his robes, which had seemed white, were not so, but were woven of all colours, and if they moved they shimmered and changed hue so that the eye was bewildered.
"I liked white better," I said.
Gandalf, The Council of Elrond, FotR