 But the notion also plays a central role in theories of physicalist objectivists such as McLaughlin (2003) and Jackson (1998). According to McLaughlin, colors are the “occupants of a certain functional role-description” (2003: 479), where the functional role is specified in terms of the ways things look, that are peculiar to colors. Jackson makes crucial use of what he calls “the prime intuition about colour”: The prime intuition is simply that red is the property objects look to have when they look red (Jackson 1998: 89). Finally, both Byrne &amp; Hilbert 2003 and Boghossian &amp; Velleman 1991 [1997] characterize the dispute between realists and non-realists on color, to concern “certain properties that objects visually appear [i.e., look] to have” (Boghossian &amp; Velleman 1991 [1997: 117]). As Boghossian and Velleman put it,