[RMcNeal]

When we replaced the roof on our S&B a few years ago, I went with Charcoal Dark Grey shingles. They replaced a very light grey shingle we had before. There was less than a 1 degree difference in attic temperature between the two. I have a thermometer in the attic and an attic fan set to kick on at 125 degrees.
I really though it would make a more significant difference, but that wasn't the case.