Here are three images of Alan McMurtrie's Iris reticulata hybrid 'Sea Green'
The third image shows how the color changes as the flower ages.
My wife mentioned that a green flower wouldn't stand out much against green foliage.
I agree, but I'm more impressed with that peacock blue-green color of the style arms of this hybrid. Wouldn't that be cool, out on the falls and/or standards of a bearded iris!!!