" wrote:

Agree that color isn't going to make a significant difference.

Lighter-colored shingles last longer, have lower surface temperature
than dark shingles.

And of course in northern climates, it's safe to assume that in
the winter with a darker roof you get some small benefit from a
darker roof that would lessen the effect even more.

Bull****.

As I've stated before, any heat-transfer that you *hope* exists in the
winter to gain attic heat into the house will bite your ass in the
summer as that same heat transfer will be an extra load on your AC.

Dark shingles in northern climates can add to the ice-damming effect
where snow melts on a dark roof, runs down to the eves where it's colder
and freezes, creating water backup under the shingles and huge icicles
hanging off gutters.