what pssh said. the 2nd im am leaning towards female. by the back it does lean kind of towards a male. but females are usually smaller and from my experience and all the pygs ive delt with, the females are more stoute with wider stomach, even when not gravid, (just a slight difference from the male) i also want to say ive never seen that green on a any pygmy, but have seen pygmies green before, though all of the males ive delt with were more darker black/grey/brown patterns with green tints on the skin. the lighter color and green makes me want to say female too. just my 2cents
3 doesn't look that bad. His head fat storing thingies aren't super sunken in yet. Are you basing the gender on the back? It's tail looks kind of short for a male. I suppose it could be the angle?