This is Maybelline Express Finish Cool Couture, which is a medium grey creme polish with turquoise shimmer. The shimmer is very fine and a little shy in indoor light. So, inside it tends to blend into the grey and give the whole nail a slate blue color, which is pretty on it's own. However, in bright or natural light, the shimmer shows up. Then, this polish reminds me of the stone labradorite, as you can see in this picture. For my accent nail, I added one coat of an unnamed BonBons turquoise bar glitter. The color matches the shimmer in Cool Couture perfectly.
The formula on Cool Couture was a little tricky. It was a little thick and very patchy on the first coat. After the second coat, it evened out pretty well, but I still had a few bare patches here and there. With careful application, you can make it work in two medium coats; it just requires a little extra attention.
Finally, here's a bottle picture. The shimmer is a little more pronounced here than on the nail, but it gives you a good idea of the color. On the whole, I really like this polish. It's an unusual combination of colors, which I think is great for winter.