Sephora by OPI is the only nail colour i usually purchase, and this colour, Mash Up is simply wonderful. Sephora describes it as an opaque opalescent gray. It is so pretty! Its a gray color with a colorful finish, when you look at it it seems to shimmer a bit of pink or blue depending on the light. This is my go-to color for my toes, and i also use it as a base color for some of the glittery top coats Sephora sells. Definitely recommended!