The red barnwood is Cabot Semi Transparent Baked Brick. This was applied to old, weathered wood, so applying the same color to new wood might result in a brighter color. It's always best to try a few samples first.
The dark grey paint color was a custom match to the metal roofing we used, so unfortunately there isn't a color name. The metal roofing color is "Burnished Slate" (a pretty universal color in metal roofing). You could probably get a roof sample from a local building supply and have the paint store match it.
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