Upon examination, I find only one of the reasons commonly produc'd for this opinion to be satisfactory, viz. that deriv'd from the variations of those impressions, even while the external object, to all appearance, continues the same. These variations depend upon several circumstances. Upon the different situations of our health: A man in a malady feels a disagreeable taste in meats, which before pleas'd him the most. Upon the different complexions and constitutions of men: That seems bitter to one, which is sweet to another. Upon the difference of their external situation and position: Colours reflected from the clouds change according to the distance of the clouds and according to the angle they make with the eye and luminous body. Fire also communicates the sensation of pleasure at one distance, and that of pain at another. Instances of this kind are very numerous and frequent.-Hume, A Treatise of Human Nature, Book I, part iv, "Of The Modern Philosophy".Are colors relational or non-relational properties of their bearers? Is red a property that is instantiated by all and only the objects with a certain intrinsic (/non-relational) nature? Or does an object with a particular intrinsic (/nonrelational) nature count as red only in virtue of standing in certain relationsfor example, only when it looks a certain way to a certain perceiver, or only in certain circumstances of observation? In this paper I shall argue for the view that color properties are relational (henceforth, relationalism), and against the view that colors are not relational (henceforth, anti-or non-relationalism).Before I come to this, a caveat is in order. Relationalism is not, by itself, a theory of the nature of color (although it may be more easily reconciled with some theories of the nature of color than others). It is a theory about what sorts of properties colors are -namely, that they are relational properties; but it does not say which properties of that sort -which relational properties, in particular -colors are. As it happens, relationalism has been seen by its fans and foes (e.g., [McGinn, 1983], [Stroud, 2000]) as the most important support for the view that colors are dispositions to appear certain ways to subjects (this is a view sometimes ascribed to modern philosophers such as Galileo, Boyle, Newton, Locke, and defended by more recent writers such as [McGinn, 1983],