Who says black is the new black? All manicured fingers point to Mike Potter, an NYC makeup artist who spent years putting ebony nail polish on big stars (Karen O.) and big screens (Hedwig and the Angry Inch). When he couldn’t find a truly matte version without any gleam or gloss, Potter created Knock Out cosmetics. His addictive Flatte Black nail paint is shiny when wet but dries sans shimmer with one coat. (Imagine the look of fresh charcoal.) Find the chip-resistant lacquer (which also comes in lusterless white and, soon, Calamine) in the Chrysler Building of polish bottles — a tall, slender brush in a frosted art nouveau glass. It’s powerful, elegant, iconic. And easy to take a shine to. Available at Miomia, 318 Bedford Avenue, between South 1st and 2nd Streets, Williamsburg (718-388-0149 or shopmiomia.com); Henri Bendel, 712 Fifth Avenue, at 56th Street (212-247-1100). To see styles, go to koknockout.com. Love it when he talks nerdy to you? Nominate your office tech boy for DailyCandy’s Get with the Programmer contest.