We all saw the look on the runways during spring fashion week: matte finish nails. “The Butter line of polishes is flying off our shelves,” says Kari Puckhaber of KD Studio in Katonah. “We have sold out of their Matte Finish Shine-Free Topcoat.” Not to worry; KD has more on order. Also no need to worry about nasty ingredients like formaldehyde, toluene, DBP, or parabens. There are five new colors in the Spring 2011 Collection: Blagger, a cobalt blue; Dosh, an apple green with metallic gold; Hen Party, a sheer neutral; Lady Muck, a powdery periwinkle blue with a pearlized pigment; and Teddy Girl, a bubblegum pink; $14 each at KD Studio (196 Katonah Ave, Katonah, 914-301-5798).