This is Square Hue Na Prikope and Essie Sew Psyched:
These are both very grayed-out greens - in the bottle they both look olive, but that doesn't show up so much on the nail. (But I'm not sure they actually look as dark as they appear on my nail swatches, either.) "Army green" is maybe the best term for them. The Square Hue is from the Prague collection and apparently it's the name of a street in the Prague shopping district, near Wenceslas Square. Sew Psyched is a classic Essie color that's still current. The main difference between these two is that Sew Psyched has some shimmer to it and Na Prikope doesn't.