A striking empirical finding about color perception is that normal perceivers disagree about which hues are pure. (Pure hues contain no perceived tinge of any other color.) This finding poses a prima facie problem for color objectivism and representationalist accounts of perceptual experience. Michael Tye attempts to resolve this problem by arguing that pure hues do exist as objective properties of ordinary objects, but that human color detection mechanisms did not evolve with sufficient refinement to allow us to determine which hues are the pure ones. I argue that Tye's attempted solution fails, and that the most reasonable conclusion consistent with color objectivism is that pure hues do not exist.