Great job on the orcs. I really like the skintone. Only suggestion would be to add a bit of color variation to the inside of the ears too. If you look at the second image, the ear almost merges with the shoulder/chest, doesn't seem like a separate entity. I would use the same color as you did on the upper lip for the inside/bottom of the ear (keep the top part green). A minor detail of course, so please keep the green if you like that better!
I love Allan's cyclops sculpt. It will be fun to watch you paint that one too!