Blue, Green, Yellow, Orange, Red exemplifies Kelly’s lucid, forthright style. Five monochrome panels are arranged in the order of the chromatic spectrum, the primary colors balanced by their intermediary values of green and orange. The concentrated colors are charged by their interaction with each other, and the work’s size—monumental, yet at a human scale by virtue of its breakdown into vertical panels—further strengthens its presence. Dark Blue Curve signals Kelly’s longtime interest in shaped canvases. It is this focus on peripheral shape identified by color that makes his paintings sculptural, engaging directly with their own forms and the walls around them. The shaped monochromes reinforce the anti-illusionistic project begun with Kelly’s rectangular panels; unframed and unmarked save for their color, they are a more emphatic denial of the window-onto-the-world view of the traditional four-sided easel painting. Wright Curve, a steel sculpture designed for permanent installation in the Guggenheim’s Peter B. Lewis Theater, is named after the museum’s architect, Frank Lloyd Wright. Its affinity with the palette and geometry of the auditorium shows the artist’s interest in encouraging site-specific experiences of his painting and sculpture. For Kelly, the transition between the two mediums is fluid: “sculpture for me is something I’ve brought off the wall.”