The trouble here is you have merging/converging folklore.
You have:
1) Saint Nicholas of Myra was a 4th-century Greek Christian bishop of Myra (now Demre) in Lycia, a province of the Byzantine Anatolia, now in Turkey.
2) Germanic paganism, Odin - The god Odin's role during the Yuletide period has influenced concepts of St. Nicholas in a variety of ways, including his long white beard and his gray horse for nightly rides Sleipnir, which was traded for reindeer in North America.
3) Dutch folklore - In the Netherlands, Belgium and Luxembourg, Saint Nicholas ("Sinterklaas", often called "De Goede Sint"—"The Good Saint") is an elderly, stately and serious man with white hair and a long, full beard. He wears a long red cape or chasuble over a traditional white bishop's alb and sometimes red stola, dons a red mitre, and holds a gold-coloured crosier, a long ceremonial shepherd's staff with a fancy curled top. To administer the distribution of presents Sinterklaas writes in the book of Saint Nicholas that contains notes on all children that indicate whether the child has been good or naughty during the year. He traditionally rides a white-grey horse.
4) English folklore - Father Christmas dates back as far as 16th century in England during the reign of Henry VIII, when he was pictured as a large man in green or scarlet robes lined with fur. He typified the spirit of good cheer at Christmas, bringing peace, joy, good food and wine and partying. As England no longer kept the feast day of Saint Nicholas on December 6, the Father Christmas celebration was moved to December 25 to coincide with Christmas Day.
Most of the traditions he has been developed from have come from cultures where the people were white - so many think of him as white.
But he could be any color you want him to be.
I don't know too many Asians or Africans with big white beards but if you want to ditch the beard concept there's no stopping anyone.
Occasionally Santa is female - La Befana of Italy and Kolyada and/or Babushka of some parts of Russia.
Folklore doesn't stand still - it keep growing and evolving.
http://en.wikipedia.org/wiki/List_of_Christmas_gift-bring...