Dive Right In is an iridescent aqua blue with a frosted, metallic sheen. It had so-so color payoff when applied dry and was semi-opaque when applied damp--it was smoother when applied damp as well. This shade creased on me noticeably after eight hours of wear (no primer). This is a limited edition shade, so you'll likely have to find it at a local drugstore (I received this as a press sample; the other two shades I purchased myself). Giorgio Armani #10 is more silvered. Make Up For Ever #150 is bluer, less iridescent. Giorgio Armani Ecailles Black Pearl #3 is much darker.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.