DMAC - sorry this has taken so long - work has been insane.
Basically, Snow-in-Dusk's skin is albino, but in several areas (such as the backs of her forearms, shoulders, cheeks, tops of the hands and feet, etc) she has snowflake-like spots. These spots appear basically in the same manner as do freckles, however, they are a very, very light brown coloration (dun colored) and resemble nothing so much as soft, muted snowflakes. They are a bit larger than freckles, but other than that seem to appear in the same general manner as they do. They are very light and only seen when you really look at her for a moment; a casual observer will miss them in the unsual and stark whiteness of her skin.
Also, whereas most albinos have pink coloration to their eyes, Snow-in-Dusk's eyes display this dun coloration instead.