Originally Posted by Poseidon
That's sabino and sooty. The manes on Fjords is caused by their "version" of dun that's specific to Fjords. Non-dun Fjords (which do exist) have solid manes and tails. The OP's mare isn't a dun.
Not sure if this is true, but if it is they would not be allowed into the registry. Registered Fjords must have DNA tests done to prove that the parentage is true and that they carry all required traits, which includes dun.
Way back when the breed was first being developed, the majority were not dun, but over the past hundred years the breeding has been closely regulated to make sure that the gene is passed on to all foals.
White markins as well are prohibited, and only mares are allowed to have stars but nothing more.