When he was an art student in the '80s — in Kassel first, and then Berlin — Markus Linnenbrink worked primarily with grays and blacks. “I had no idea what to do with color,” he admits. “And honestly, I was a little afraid of it.” Which is ironic, considering that for more than a decade, the German-born, Brooklyn-based artist has built a body of work that centers around thick streaks of color — painted in stripes on gallery walls, poured in puddles on the floors of art-fair booths and installations, and dripped in lines down the face of his canvases. “Somehow a field trip to Italy where we spent three weeks painting outside got me into the idea of color, but I had a long period where I would mix, like, red and green. I feel like I had to walk through a lot of dirt and mud to get to the brightness.”