Another idea - change the thumbprint pattern and house to dark gray, and leave the leaf in green inside it (so they contrast, and the leaf "pops"). Then try the word Green in the same green as is in the leaf, and the Print in the same gray as in the thumbprint and house.
Dude, thanks for all of your submissions and flexibility - we feel like we're overworking you, but it IS down to crunch time! Appreciate it.