 At latest by the eighteenth century, however, and particularly in the British Isles, beauty was associated with pleasure in a somewhat different way: pleasure was held to be not the effect but the origin of beauty. This was influenced, for example, by Locke’s distinction between primary and secondary qualities. Locke and the other empiricists treated color (which is certainly one source or locus of beauty), for example, as a ‘phantasm’ of the mind, as a set of qualities dependent on subjective response, located in the perceiving mind rather than of the world outside the mind. Without perceivers of a certain sort, there would be no colors. One argument for this was the variation in color experiences between people. For example, some people are color-blind, and to a person with jaundice much of the world allegedly takes on a yellow cast. In addition, the same object is perceived as having different colors by the same the person under different conditions: at noon and midnight, for example. Such variations are conspicuous in experiences of beauty as well.