If the right account of how hue magnitudes contribute to representational content is given, then similarity relations among hues and the binary/unique distinction can be explained in terms of the content of color experience
color experience(as used in philosophy of perception and consciousness)
What it's actually like to see color—the subjective feeling and perception you have when you look at something colored, not just the physical facts about light wavelengths.
hue magnitudes(Byrne and Hilbert's account of color realism)
Properties that color experiences represent objects as having, which are identified with certain physical properties and whose contribution to representational content explains hue similarity relations and the binary/unique hue distinction
similarity relations(as used in philosophy of perception)
The ways that things can be alike or resemble each other according to specific features. For instance, orange and red are similar because they're both warm colors.
Tye and Byrne and Hilbert have proposed a solution to this last problem, one that depends on exploiting the opponent-processing model of color vision (see Supplement Color Science: Some Complexities.). It is to specify the relevant groups of spectral reflectances, associated with each color, in terms of their capacity to produce suitable responses of the visual system. The argument, by Byrne and Hilbert, proceeds in two steps: (1) it is argued that color experience are characterized as having a