NARS Back Room is a neutral-toned, very dark black with a cream finish. It is a limited edition nail lacquer that retails for $20.00 and contains 0.5 oz.
NARS Back Room Nail Lacquer ($18.00 for 0.50 fl. oz.) is described as "black." It's a rich, deep dark black with a glossy finish. I know it's going to sound bizarre, but I don't have a lot of black cream polishes. MAC Nocturnelle is one of the few I have (and for some reason, I have a few of them). It's not quite as dark and doesn't dry down to the same naturally glossy finish. MAC Beyond Jealous is a tiny bit teal but mostly black. What's your favorite black cream?
Continuing with the same hues that have made NARS Nail Polish a coveted favorite, NARS introduces a new technology to its Nail Polish, specifically designed to help improve the formula's flexibility, durability, wear and gloss properties. NARS reintroduces its Nail Polish with a newly developed polymer system that provides extended wear and a tough, durable, chip-resistant finish. The superior longwearing formula also imparts an initial high-gloss luster with prolonged gloss retention, and is also water and detergent resistant with additional UV protection to prevent polish discoloration.