However, according to Wikipedia his hair was more of a blond colour.
The historian Michael Prestwich states that his "long arms gave him an advantage as a swordsman, long thighs one as a horseman. In youth, his curly hair was blond; in maturity it darkened, and in old age it turned white. [His features were marred by a drooping left eyelid.] His speech, despite a lisp, was said to be persuasive."