Hair color and IQ

Has anybody ever tried to find a correlation between hair color and IQ
score? Even though the phrase "dumb blond" may sound like a cliché, I think
there is a certain amount of truth to it. In fact, if you take a close look
at pictures of some of the most brilliant people, you will find that almost
all of them have dark brown hair. Some have light brown hair, a small
percentage have jet black hair and almost none of them have blond or red
hair. This is not the distribution that you see in the general population.
Obviously, I'm omitting older people with gray hair from this assessment.

It shouldn't be too surprising why those with jet black hair would be
underrepresented among the most intelligent since these are the people who
usually belong to low IQ races. But the reason why this same trend holds
true for those with light colored hair is a little more complicated. Is
blond hair a sign of inbreeding in some cases?

        Robert