Is color in your mind or in the thing? Is that dress white and gold or blue and black? Malcolm Harris’s review of a new work of philosophy about color can help you think about that. “In her new book Outside Color, University of Pittsburgh professor M. Chirimuuta gives a serendipitously timed history of the puzzle of color in philosophy. To read the book as a layman feels like being let in on a shocking secret: Neither scientists nor philosophers know for sure what color is.” It turns out color is not an object of sight but a way of seeing them.