Stormy Seas is a dusty blue/grey/green. Yes, it really has all those hues! And it's a gorgeous color. I've sold many, many pieces of furniture painted with this color.
Pro tip: How much should I buy? There are many variables in painting furniture, so there's no single answer to this question. I recommend erring on the side of making sure you have enough paint. You can always use leftover paint for future projects, picture frames, candlesticks, etc.
An 8 oz. jar generally covers a small project like a night stand or occasional table.
A 16 oz. jar generally covers a typical dresser, buffet or vanity.
A 32 oz. jar generally covers 2-3 average-sized pieces of furniture.