* Traditional depictions: Most classic images of Santa Claus show him with white hair and beard, but this is a convention of the character, not necessarily based on any real person.
* Possible explanations: Santa is often depicted as an older man, so his hair and beard could be naturally graying or white due to age.
* No real-life basis: Santa Claus is a fictional character, so we can imagine him having any hair color we like!
So, the answer is that it's up to your imagination! 😊