Doesn't describe Stormvermin.
Says the Council of Thirteen had Albino guards, but then states they weren't albino, but there guards either Dyed there fur, or it turned white when they joined. Thanquol (who kinda should know) didn't know which. But knew they were not natural born white, so not albino. Before 4th, there was Stormvermin AND Black Skaven, in 4th they where fused into Stormvermin. Regiments section page 63
"Stormvermin are much larger than ordinary clanrates and many have black fur. For this reason, Black-furred Skaven have a reputation for being killers, and are much feared amongst the clanrats',
Earlier, Bestiary section, page 50
"The rank of different skaven can often be distinguished by their fur colour - Assassins and the giant Stormvermin usually have black fur (considered the mark of a pure killer in skavendom), white or grey fur denotes great leaders and wielders of magical power while the bulk of skaven ave reddish brown fur or piebald-type marklings. Fur is often further branded or painted with clan mahrkings or runes, more occasionally it is bleached or dyed to denote special status as honour guards, sacrificial slaves, and so do"
If we want to continue, I think setting up a nice bit in general chat. Like I said, end of the day do what you like, but in oldhammer fiction, white/grey is a limited fur colour ^_^ Stormvermin are mostly black.