This is a 'mood changing' polish, that said it changes colour based on temperature. I have another one of these polishes, in the shade 15 which is purple and pink. This particular polish is blue when warm and purple when cold, as I have long nails it gives a French manicure look to the nail where the length is colder than the nail bed.
This is two coats of the polish with a topcoat, I think that three coats would be ultimate opacity. I ran my fingers under the warm water tap and got this colour on my nails;
And this is the colour which happened once I ran my fingers under the cold water tap;
