 Cohen (2004, 2009) holds a similar position, though he has produced a more general argument. For Cohen, Color Relationalism is the metaphysical thesis that colors are relational properties of a certain sort—relational with respect to perceivers and circumstances of viewing. According to Color Relationalism, there are no such properties as blue, red, yellow, orange, etc. To be more precise, there are no such properties as blue simpliciter, red simpliciter, and so on. What there are, instead, are relational properties: blue-for-perceiver A-in-circumstances C1, red-for-perceiver B-in-circumstances C2, yellow-for-perceiver D-in-circumstances C3, and so on.