Have you considered Brown Leghorns?
They would have the color you want, and the good laying abilities.
As far as being cold-hardy, I've read that Leghorns tend to cope well with cold except for their combs and wattles, which are prone to frostbite.
Brown Leghorns do come in a rose comb variety, which would probably fare better than the large floppy single combs.
Or you could consider getting the single comb variety, then dubbing the combs and wattles, as some people do with gamefowl roosters (that means, cutting off the combs and wattles, in this case for both genders.) Or you could let them each get frostbitten the first winter, fall off, and be fine thereafter. I suspect dubbing is overall less painful than letting frostbite do it, but I do not know for sure.