Flat Iron Green is a dark green, that basically looks black unless in sunlight...which is a pet peeve of mine.
So, I added Nfu Oh's 40 overtop...40 has blue / green flakies and I thought with the dark green base it'd look cool.
Here's a good side view that shows off the duochrome nicely (make sure to click to enlarge the photo!)
and a closeup, another good shot of the blue and green of the flakies:

