The white variant is white during winter, but it is brown on the back and light grey on the belly during summer. The blue variant is mostly grey, steel blue, or brown for the whole year. Although the blue allele is dominant over the white allele, 99% of the polar fox population is born with the white variant. Among those two variants, five varieties of coloring can be distinguished – blue, white, beige, sapphire, and shadowy.
