I'm a greybeard.
Between shaving early on Sunday, and not shaving till I went out again on Wednesday afternoon, I sprouted whiskers a little thicker than usual. (Someday, when I really don't care, I'm going to let it all grow.) And, try as I did to explain what I saw as "a trick of light," I have to admit--some of 'em are grey and even white!.
Meanwhile, the hair of my head remains brown-blond; but it keeps getting thinner.