Out of all the shades in the collection this one definitely seems to be the star. On the Essie website it's described simply as a 'shimmering marine-blue green'. I'd say it leans a little bit more green then blue.
Naughty Nautical, taken indoors by a window
Naughty Nautical, taken outside with sunlight
The shimmer in Naughty Nautical is quite sublte and very pretty; I like that it's not all up in your face! I think it's what really makes this polish.
As for the formula and application, it was a bit on the thin side and kind of runny. I felt as if I always had too much product on the brush. Otherwise application was alright, and it only took two coats to be opaque. One thing I would like to note is that this polish began chipping on me the very next day, though. I never talk about the wear-time of polishes because it varies so much from person to person and what they do, but I was surprised and then sad that this chipped so quickly on me (on multiple nails too). Polishes never chip on me that quickly, or if they do it's a small chip on perhaps only one nail. Regardless, I love Naughty Nautical, and would still recommend it.. it's just so pretty!