Blue Fox (Alopex lagopus / Vulpes lagopus)
Pale grey in colour but can produce almost white fur, known as white or shadow fox. Often dyed in many shades. Soft and thick hair is often used for collars and trimmings. Also used for jackets and full-length coats.
Source: http://www.wearefur.com/about-fur/fur-types/blue-fox-alopex-lagopus-vulpes-lagopus