This coloration first appeared in the 1930's in Scandinavia, but the same color appeared in separate lines in the US and Canada over the course of the next decade from when it first appeared in Norway. Similarly to how the pearl fox received several different names, the platinum fox has been known as Mons platinum, Paulsrod fox, and Odnes fox. However, most of these names are now irrelevent outside of historical context, and platinum foxes are generally referred to as such. Platinum is also an encompassing market name for whitemark foxes as well.
Platinum foxes are characterized by dilution of all of the background color of the fox, resulting in a pale coat, as well as generally large swatches of white on the face, legs, throat and underbelly. This is often distinguishable from typical whitemark foxes ,which have smaller areas of white and does not dilute the underlying color.
Platinum foxes, like white mark, can have heterochromia of the eyes or entirely blue eyes. Platinum is also an incompletely dominant gene that is lethal in homozygous condition. Thus, platinum foxes should not be bred to one another. This results in reduced litter sizes due to embryonic death. Fox kits that are sometimes born are all white with blue eyes. These kits are very weak and usually die immediately after birth and generally do not survive into adulthood. The same can be expected if platinum is bred to whitemark or Georgian white. If one wishes to produce a platinum fox, it is best to mate a platinum parent with a silver or other non-lethal color.
Platinum foxes carrying the pearl factor tend to have a paler coat color, similar to silver foxes carrying the pearl factor. The Platinum coloration can range from very pale to dark, and indiscernible from whitemark