Check out the devardi dark marine blue green.
I just started sorting through my glass to put in my way cool pvc glass storage unit (yay me for finally building the blasted thing!). I found a devardi short that looked like dark teal, but I know it's devardi because of the shape of the rod, lol.
I wasn't sure, so I went and grabbed my dark teal stash and my light teal as well. My teal is from at least three years ago. The light teal is a dead ringer for the light marine blue green from devardi, and the dark teal is just a smidge not quite the same shade as this rod, so faint that it could be my eyes. A teeny, teeny bit more green, maybe. My family couldn't tell the difference between the colors, one of which is a girl with decent color sense.
I'm 99% sure this match for dark teal is the dark marine blue green. It might be the middle one, but the saturation of the color makes me think it's dark. It's certainly worth a shot for those of you lusting for the color from a few years ago.
I know I'm going to get some of it, or more of it, lol, when I order again. The rod I have is an unlabeled short freebie