Not all "Red foxes" are red!

The red fox is just the common name of the species Vulpes Fulvus (American red Fox) and Vulpes Vulpes (European red fox)

In the wild Red Foxes come in a few colors.

Red, Silver, "cross" (which is a mix of red and silver), and white (which is either albino or leucistic).

Red Foxes in captivity come in DOZENS of different colors. These unnatural colors are a result of selective breeding, mutations, and inbreeding. The colors happen because of recessive or "hidden" genes in the foxes as well as random mutations of genes.

Source: Save-a-Fox Corporation