Hmm, I just saw this part:
"Kitsune, or fox, grow in power as they age. After a century, they grow a tail and gain the ability to shape-shift and possess people. The most powerful foxes are those who reach the grand old age of 1,000 (the so-called nine-tailed fox). When a kitsune gains nine tails, its fur becomes silver, white, or gold, and it gains the power of infinite vision."
So in keeping with tradition, nine-tailed Kitsune should be silver, white, or gold then?