Glad you are getting a new roof Jake. What color did you go with?
I have two different height roofs. The high ones and the low(porch) ones. I put dark green metal on the high ones and wrapped the 2x6 facia with the same colored metal to make it look a little sharper. My wife wanted arch. shingles on the lower roofs so I went with that. As long as I had less maintenance and the snow came off of the higher roofs well, I was happy.
Burnished slate . . . to me it looks like dark gray or light black.