It almost always looks black on photos, maybe it wants to be a Black Hole when it grows up? -Maybe all black hole in the known Universe began as Dark Blue Super Mugs!? :o
Btw, here is a link of how the colour looks in Real Life (if not even a tiny bit darker, me thinks). -> Lacivert
And below another try at getting a better look at the colour!
(I look like Quasi Modo in the reflection *groans*)