What does the Bible say about dying your hair?

I was very surprised about a year ago to find out that at least some UPC churches teach against people dying their hair. I do not recall ever hearing anyone preach against people dying their hair until about a year ago, but since then I have come into contact with other people who have heard the same thing preached. It seems to be a fairly common doctrine in UPC churches, even though I cannot find any official UPC position about it. Since it does seem to be such a common doctrine, I have decided to write a brief article on it…