Here is a sheer nude - O.P.I. Samoan Sand. I picked this up quite a while ago when I was shopping for nude polishes. This is 3 coats and you can still see the tips of the nail. This is what I would refer to as mannequin nails. This is pretty much exactly the color of my skin - especially when I am pale. I enjoyed wearing it today. It's so natural looking.
Below is a comparison to Essie Topless & Barefoot and Sand Tropez. It's really close to both of them, but like I said, very sheer.