This sadly is not it, it would be if it was a plain colour, but is a micro-fine glitter, beautiful in its own way.
Meet Revlon's Rain Forest, a lovely dark green with micro fine sparkles. Application was a bit patchy sadly, so it took a good 2 coats to opaque, but it has a nice brush which made up for it, not as wide as the Rimmel but flat. Float a coat of Seche Vite on and Voila!
The search for the illusive darkest green however goes on.