You can’t go wrong with basic black. OPI Infinite Shine Black Onyx is a classic color that can easily lean elegant or edgy. When used as part of the Infinite Shine system, this polish gives you a gel-like appearance with the ease of a regular nail lacquer. It is long-lasting and chip-resistant, so your mani can look as good as new for up to 11 days. The highly-pigmented formula goes on smoothly for opaque coverage in as little as two coats.