Kill Joy is described as a “shimmering taupe.” It’s a frosted taupe–it’s gray, it’s brown, and it’s cool-toned. The color payoff was excellent, and it applied smoothly and evenly. Urban Decay Mushroom is darker. Buxom Pug is a smidgen grayer. MAC Cloudy Afternoon is a bit browner. Urban Decay Bust is less shimmery.