Appears to be a green transparent stain on cedar shakes.

For comparison, these below are vinyl shake siding & prehung cedar shakes in panels and stained.

That is not cedar shakes, the reveals/gaps are to perfect. That is a composite or vinyl product in my opinion. or it is just completely photoshopped.

millworkman I get what you're saying but I have never seen vinyl with variations in color from shake to shake.

@BeverlyFLADeziner and @millworkman Both good points and makes me feel better about being stumped. We are doing Hardie board (not shingle) and I'm wondering if we can achieve a similar color.

You might want to check first Hardie board colors, then decide. They have nice dark colors such as Deep Ocean or Iron Gray.