Urban Decay Chaos Nail Color ($15.00 for 0.30 fl. oz.) is described as a “vibrant cobalt blue with floating tonal pearl.” It’s a brightened, medum-dark blue with a purple tint–just enough to make it a cobalt blue–with lighter blue micro-shimmer. It had a glossy finish when it dried down, and it was mostly opaque after two coats–there was a shadow of visible nail line that sometimes was apparent depending on the angle/light. Formula X Beacon (P, $12.50) is darker. MAC Blue Gaze (LE, $16.00) is darker, less shimmery. Illamasqua Force (P, $17.00) is darker, less shimmery. Obsessive Compulsive Cosmetics Pond (P, $10.00) is less shimmery, slightly darker. China Glaze Blue Year’s Eve (LE, $7.50) is a touch darker. See comparison swatches.