Here's why we can't definitively answer:
* Celebrity Privacy: Celebrities rarely publicly disclose details about their appearance choices.
* Natural Hair Color: It's possible that Andre Rieu's hair color is naturally a shade of grey or white, and he simply chooses to keep it that way.
* Hair Dye is Common: Many men in their age range choose to dye their hair to cover grey, which is a personal preference.
Ultimately, it's impossible to say with certainty whether Andre Rieu colors his hair or not.