 The upshot is that it is hard to see how we can avoid questions concerning how our color terms are ordinarily used and understood. One important approach to answering the questions is that followed by Mark Johnston, in a highly influential paper (Johnston 1992). In that paper, he implicitly acknowledges the existence of a set of linguistic and conceptual practices that underpin what might be called “our ordinary thinking about color”. This thinking is not meant to comprise theoretical thinking or theorizing about color, or at least, it is much more than that. It comprises our thinking and talking that involves our exercise of concepts of color. Johnston asks the question of which principles such thinking about color must consist in, in order to count as exercising those concepts of color.