As promised, I did a comparison of Lippmann Collection - Don't Tell Mama against other dark green/blue shimmers. In the pictures, from left to right they are:
--- Lippmann Collection - Don't Tell Mama
--- Sinful Colors - See You Soon
--- Wet n Wild - Morbid
--- Misa - Toxic Seduction
Don't Tell Mama is definitely the darkest and the shimmer is what I would call teal, since it looks blue and green. See You Soon is on the blue side of that, and Morbid and Toxic Seduction are on the green side.
What do you think?