Maltese Blue Tiger by ~Sphynxette on deviantART - seems to be that the South Chinese Tiger or Amur Tiger subspecies from Korea has evolved from a slate gray into a blue-grey. Also a close match for Kaelan in animal form: IDoD
There are only around 200 of the white tigers left in the world. I love white Bengal tigers. When my youngest was born my older children bought me one that was a stuffed animal and their sister one that was a baby that roared. So cute!