I thought paradox spots were red/orange. Maybe it depends what morph they're on?
What would he need to breed it with to get similar babies? Just another similarly-colored blizzard?
Paradox spots are simply marks which don't normally occur in a particular morph. I've only ever seen black ones, I suppose they could be any colour.
As far as I know people don't seem to know if they have a genetic factor in, but if there is and you breed two blizzards with paradox spotting the babies will have a higher likelihood of getting them.