The full-spectrum refractions of a brilliant-cut diamond. A target’s vanishing point rendered in groovy colors. Geometries that read like radio waves and totems. Rico Gatson’s art is abstraction as joy, color as energy. He calls it “a dialogue between things in space. There is a vibration.” This dazzling exhibition also includes radiant collages that feature Black Americans such as Cicely Tyson and Sidney Poitier. —L.J.