Abstract: Inter-species variation in colour perception poses a serious problem for the view that colours are mind-independent properties. Given that colour perception varies so drastically across species, which species perceives colours as they really are? In this paper, I argue that all do. Specifically, I argue that members of different species perceive properties that are determinates of different, mutually compatible, determinables. This is an instance of a general selectionist strategy for dealing with cases of perceptual variation. According to selectionist views, objects simultaneously instantiate a plurality of colours, all of them genuinely mind-independent, and subjects select from amongst this plurality which colours they perceive. I contrast selectionist views with relationalist views that deny the mind-independence of colour, and consider some general objections to this strategy

Abstract: Objectivism, in the philosophy of color, is (roughly) the claim that colors are physically constituted properties, instantiated by objects around us. On this view many objects around us both look colored and are colored. Projectivism is (roughly) the claim that objects around us look colored, but are not colored. On some projectivist accounts, colors are identified with properties instantiated by elements of perceiver’s visual systems, resulting in a systematic illusion of the instantiation of color properties by objects around us. Objectivism and projectivism are standardly taken to be incompatible theories of color. Here we argue that this incompatibility is only apparent: objectivism and projectivism, properly articulated so as to deal with basic objections, are in fundamental agreement about the ontology of color and phenomenology of color perception

Abstract:   A critical discussion of Barry Stroud's claim, in his book The Quest for Reality, that we could never rationally arrive at the conclusion that, for example, the world is not really colored

Abstract: Barry Stroud begins his investigation into the metaphysics of colour with a discussion of the elusiveness of the genuinely philosophical quest for reality. He insists upon a distinction between two ways in which the idea of a correspondence between perceptions or beliefs and the facts may be understood: first, as equivalent to the plain truth of the perceptions/beliefs in question; second, as conveying the metaphysical reality of the corresponding features of the world. I begin by voicing some suspicion about this distinction. Then I go on to consider various aspects of his central argument against the likelihood of any successful unmasking explanation in connection with colour. The final moves of this argument seem to me to be unstable. Either his conclusion that the unmasker’s overall strategy is self-defeating is stronger than is warranted, or his insistence that no conclusive result is established in connection with the fundamental quest for reality is unduly cautious, depending on how precisely the dependence, which he rightly insists upon, of the identification of perceptions of colour upon some identification of colour properties themselves, is to be taken

Abstract: Barry Stroud’s book _The Quest for Reality_1 is, I think, the most substantial study of colour realism that has yet been written. It subjects to fundamental criticism a tradition that found its classic expression in Descartes and Locke and which in many ways remains standard today; it argues to be flawed not only the traditional rejection of colours as mere ideas or features of ideas in the mind, but also the view that colours are dispositions or powers in objects to produce ideas in us—which in other quarters sometimes passes as a form of colour realism. Stroud rejects subjectivism, dispositionalism, relativism, and reductionism; but he is deliberately reticent about offering any positive account of what we believe to exist when believe colours to exist (after all, he says, in quiet allusion to Butler, everything is what it is and not another thing). And he is resolute in denying that we can give a philosophical argument to establish such belief as true. Stroud’s general conclusion can be seen as occupying a middle ground between what we might call dogmatic anti-realism and dogmatic realism. He argues (in Ch. 7) that anti-realism (or what Stroud calls the ‘unmasking’ of colours) is a view that cannot be affirmed without a kind of self-refutation—for ‘no one could abandon all beliefs about the colours of things and still _understand_ the colour terms’ (168, my emphasis). On the other hand (in Ch. 9), it remains in some sense a ‘possibility’ (204) that everyday colour beliefs might actually all be false. Stroud’s final judgment is not that we shall or should abandon the ‘Quest for Reality’, though he has expressed many reservations about it.2 The

Abstract: This essay* takes two notions of autonomy and two notions of explanation and argues that colours occur in explanations that fall under all of them. The claim that colours can be used to explain anything at all may seem to some people an outrage. But their pessimism is unjustified and the orthodox dispositional view which may seem to support it, I shall argue, itself has difficulties. In broad terms, Section 2 shows that there exist good straight scientific laws of colour, constituting what one might call a phenomenal science. Section 3 offers a larger view of what we are doing when we attribute colours to things, a view which makes it a case of holistic explanation, similar in many ways to psychological explanation. Section 2 emphasizes the model of scientific explanation, and Section 3 the holistic model found in rational explanation; but it will emerge that colour explanation in different ways fits both models, as it also does the two principal notions of autonomy that the first section identifies

Abstract: Larry Hardin has been the most steadfast and influential critic of physicalist theories of color over the last 20 years. In their modern form these theories originated with the work of Smart and Armstrong in the 1960s and 1970s1 and Hardin appropriately concentrated on their views in his initial critique of physicalism.2 In his most recent contribution to this project3 he attacks Michael Tye’s recent attempts to defend and extend color physicalism.4 Like Byrne and Hilbert5, Tye identifies color with the reflecting properties of objects (“reflectance physicalism”). Specifically, the determinate and determinable colors are identified with types of reflectances. (Setting some complications aside, the reflectance of an object is the proportion of light that it reflects at each wavelength in the visible spectrum.) These reflectance types are, in the terminology of Hilbert, anthropocentric—in the terminology of Lewis6, they are not very “natural”

Abstract: Physical objects are coloured: roses are red, violets are blue, and so forth. In particular, physical objects have fine-grained shades of colour: a certain chip, we can suppose, is true blue (unique, or pure blue). The following sort of scenario is commonplace. The chip looks true blue to John; in the same (ordinary) viewing conditions it looks (slightly) greenish-blue to Jane. Both John and Jane are “normal” perceivers. Now, nothing can be both true blue and greenish-blue; since the chip is true blue, it is not greenish-blue. Hence Jane, unlike John, is misperceiving the chip. Generalizing, the conclusion is that there is widespread misperception of fine-grained shades. According to Tye (2006), and Cohen, Hardin, and McLaughlin (2006), the previous paragraph amounts to a paradox: an apparently unacceptable conclusion has been drawn from apparently acceptable premises via apparently acceptable reasoning. (See also Hawthorne and Kovakovich 2006: 180-1.) Tye swallows the conclusion, aided by a dose of evolutionary speculation. Hardin (1988), on the other hand, rejects the first premise, and denies that physical objects are coloured. Cohen (2004) and McLaughlin (2003) claim that both Jane and John have the colour of the chip right. Our opening paragraph concealed a crucial parameter. In fact, the chip looks greenish-blue-relative-to- circumstances-C to Jane, and true-blue-relative-to-circumstances-C* to John, and the chip has both these relativized colours.¹ All this ingenious philosophizing would be in vain, of course, if the conclusion of the opening paragraph were not puzzling or problematic. So, why is it supposed to be? According to Tye, the conclusion is puzzling because John and Jane are both “_normal_ perceivers” (xx). He seems to think that it is (prima facie) plausible to assume that there is no variation in perceptual accuracy among normal perceivers. But he does not explain why this assumption should be made..

Abstract: Reflectance realism is an important position in the philosophy of colour. This paper is an examination of David R. Hilbert’s case for there being scientific support for the theory. The specific point in question is whether colour science has shown that reflectance is recovered by the human visual system. Following a discussion of possible counter-evidence in the recent scientific literature, I make the argument that conflicting interpretations of the data on reflectance recovery are informed by different theoretical assumptions about the nature of
colour, and of perception. If this is so, there cannot be neutral empirical
evidence on this point, and this does seem to undermine Hilbert’s claim for
empirical support. In the end, I suggest alternative ways of thinking about the relationship between colour ontology and empirical work on colour.

Abstract: Color relationalism is the view that colors are constituted in terms of relations to perceiving subjects. Among its explanatory virtues, relation- alism provides a satisfying treatment of cases of perceptual variation. But it can seem that relationalists lack resources for saying that a representa- tion of x’s color is erroneous. Surely, though, a theory of color that makes errors of color perception impossible cannot be correct. In this paper I’ll argue that, initial appearances notwithstanding, relationalism contains the resources to account for errors of color perception. I’ll conclude that worries about making room for error are worries the relationalist can meet

Abstract: In The Quest for Reality: Subjectivism and the Metaphysics of Colour [Stroud, 2000], Barry Stroud carries out an ambitious attack on various forms of irrealism and subjectivism about color. The views he targets - those that would deny a place in objective reality to the colors - have a venerable history in philosophy. Versions of them have been defended by Galileo, Descartes, Boyle, Locke, and Hume; more recently, forms of these positions have been articulated by Williams, Smart, Mackie, Ryle, and Hardin, among others. Stroud's aim is to argue not only that these writers fail to make their cases, but that no conceivable argument could ever convince us that colors are not a part of objective reality

Abstract: In Color for Philosophers C. L. Hardin argues that chromatic objectivism?a view which identifies colour with some or other property of objects?must be false. The upshot of Hardin's argument is this: there is, in fact, no principled correlation between physical properties and perceived colours. Since that correlation is a minimal condition for objectivism, objectivism is false. Mohan Matthen, who accepts Hardin's conclusion for what can be called "simple objectivism," takes it that an adaptationist theory of biological function applied to colour is able to surmount the problems Hardin describes. It is Matthen's view that I am primarily concerned with in this paper. I will argue that it entails an overly simple view of adaptive value?as, perhaps, do all objectivist views

Abstract: The Quest for Reality, contains, amongst much else, a sustained and deeply illuminating investigation of the thesis Barry Stroud labels ’subjectivism’ about colours. The grounds he relentlessly amasses for rejecting the thesis are, in my view, compelling. There is a sense, indeed, in which I think they are more compelling than he says he himself finds them. For as I understand his arguments, they contain the materials for delivering a positive answer to the question: are objects really coloured? As Stroud himself presents the outcome of his investigation, they do not. Actually, to put it in this ’headline-grabbing’ way is misleading. The real issue turns on the main concern of his book-- his immensely thought-provoking investigation of the questions: what counts as a metaphysical account of reality? And, in the test case of colours, can the task of addressing the question of whether they are or are not part of reality be successfully undertaken? The suggestion I will be making is that his rejection of subjectivism contains the materials for asking about the metaphysical reality of colour in a way that is distinct from the way he shows cannot work; and that on this distinct way, the answer to the question of whether objects are really coloured is: yes. So, he might either reject the very idea that this alternative way of framing the question about colours does count as an example of a metaphysical quest for their reality; or he might agree that it is one, but disagree with the positive answer I sketch on his behalf, so to speak

Abstract: Whether or not one endorses realism about colour, it is very tempting to regard realism about determinable colours such as green and yellow as standing or falling together with realism about determinate colours such as unique green or green31. Indeed some of the most prominent representatives of both sides of the colour realism debate explicitly endorse the idea that these two kinds of realism are so linked. Against such theorists, the present paper argues that one can be a realist about the determinable colours of objects, and thus hold that most of the colour ascriptions made by competent speakers are literally true, while denying that there are any positive facts of the matter as to the determinate colours of objects. The result is a realistic colour realism that can certify most of our everyday colour ascriptions as literally correct, while acknowledging the data regarding individual variation

Abstract: The dispute between realists about color and anti-realists is actually a dispute about the
nature of color properties. The disputants do not disagree over what material objects are
like. Rather, they disagree over whether any of the uncontroversial facts about material
objects – their powers to cause visual experiences, their dispositions to reflect incident
light, their atomic makeup, and so on – amount to their having colors. The disagreement
is thus about which properties colors are and, in particular, whether colors are any of the
properties in a particular set that is acknowledged on both sides to exhaust the properties
of material objects (1991, 67)

Abstract: Realists about color, be they dispositionalists or physicalists, agree on the truth of the following claim: (R) x is red iff x is disposed to look red under standard conditions. The disagreement is only about whether to identify the colors with the relevant dispositions, or with their categorical bases. This is a question about the representational content of color experience: What kind of properties do color experiences ascribe to objects? It has been argued (for instance by Boghossian and Velleman, 1991) that truths like (R) cannot be used in an account of the colors as they would result in ‚circular’, and therefore empty, contents. It has also been argued (for instance by Harman, 1996) that switching to an account of color in terms of a functional account of color sensations would result in a circular, and therefore empty, account. In this paper, I defend a realist account of color in terms of a (non-reductive) functional account of color sensations. Such an account of sensations has been suggested by Pagin (2000), and it can be applied to color sensations without the resulting account of the colors themselves being circular or empty. I argue that the so-called transparency of experience does not provide any argument against such an account. I also argue that on such an account, the issue of physicalism vs. dispositionalism boils down to the question of the modal profile of the color concepts

Abstract: forthcoming in Theories of Color Perception, ed. R. Schumacher, special issue of Erkenntnis 2007

Abstract: There are serious reasons for accepting each of these propositions individually but there are apparently insurmountable difficulties with accepting all three of them simultaneously if we assume that color is a single property. 1) and 2) together seem to imply that there is some property which all organisms with color vision can see and 3) seems to imply that there can be no such property. If these implications really are valid then one or more of these propositions will have to be rejected in spite of whatever reasons can be given for their apparent acceptability. Before going on to discuss possible resolutions of this apparent contradiction it is worth pointing out there our three propositions are not all of a kind. Proposition 1) is a metaphysical thesis about the ontological status of color and proposition 3) is an empirical thesis about what properties organisms with color vision are capable of detecting. If you accept 1) then 2) will appear to verge on the trivial, but if 1) is denied then the status of 2) will appear more problematic. In what follows I will have more to say about why we either should or should not accept all three of these propositions

Abstract: Objects appear different as the illumination under which they are perceived varies. This fact is sometimes thought to pose a problem for the view that colours are mind-independent properties: if a coloured object appears different under different illuminations, then under which illumination does the object appear the colour it really is? I argue that given the nature of natural daylight, and certain plausible assumptions about the nature of the colours it illuminates, there is a non-arbitrary reason to suppose that it is under natural daylight that we are able to perceive the real colours of objects

Abstract: What is color? What is color vision? Most philosophers answer by reference to humans: to human color qualia, or to the environmental properties or "quality spaces" perceived by humans. It is argued, with reference to empirical findings concerning comparative color vision and the evolution of color vision, that all such attempts are mistaken. An adequate definition of color vision must eschew reference to its outputs in the human cognition and refer only to inputs: color vision consists in the use of wavelength discrimination in the construction of visual representations. A color quality is one that is generated from such processing

Abstract: What is the relationship between color experience and color? Here, I defend the view that it is semantic: color experience denotes color in a code innately known by the perceiver. This semantic theory contrasts with a variety of theories according to which color is defined as the cause of color experience (in a special set of circumstances). It also contrasts with primary quality theories of color, which treat color as a physical quantity. I argue that the semantic theory better accounts for the kinds of knowledge we have regarding both the color of objects that we see and of the colors themselves.

Abstract: This book defends the radical thesis that no physical object has any of the colours we experience it as having.

Abstract:   I defend a version of color subjectivism — that colors are sortals for certain neural events — by arguing against a sophisticated form of color objectivism and by showing how a subjectivist can legitimately explain the phenomenal fact that colors seem to be properties of external objects

Abstract: In this paper I argue that all transparent objects are colorless. This thesis is important for at least three reasons. First, if transparent objects are colorless, there is no need to distinguish between colors which characterize three-dimensional bodies, like transparent colors, and colors which lie on the surface of objects. Second, traditional objections against color physicalism relying on transparent colors are rendered moot. Finally, an improved understanding of the relations between colors, light and transparency is provided.

Abstract: Most objectivist and dispositionalist theories of color have tried to resolve the challenge raised by color variations by drawing a distinction between real and apparent colors. This paper considers such a strategy to be fundamentally erroneous. The high degree of variability of colors constitutes a crucial feature of colors and color perception; it cannot be avoided without leaving aside the real nature of color. The objectivist theory of color defended in this paper holds that objects have locally many different objective colors. Most color variations are then real and result from the extreme richness of color properties.

Abstract: I argue that Byrne and Hilbert have not answered Hardin’s objection to physicalism about color concerning the unitary-binary structure of the colors for two reasons. First, their account of unitary-binary structure seems unsatisfactory. Second, _pace_ Byrne and Hilbert, there are no physicalistically acceptable candidates to be the hue- magnitudes. I conclude with a question about the justification of physicalism about color

Abstract:   A brief description of the goal and main lines of argument of The Quest for Reality, in reply to the responses of Paul Boghossian and Alex Byrne

Abstract: We say "the grass is green" or "lemons are yellow" to state what everyone knows. But are the things we see around us really colored, or do they only look that way because of the effects of light rays on our eyes and brains? Is color somehow "unreal" or "subjective" and dependent on our human perceptions and the conditions under which we see things? Distinguished scholar Barry Stroud investigates these and related questions in The Quest for Reality. In this long-awaited book, he examines what a person would have to do and believe in order to reach the conclusion that everyone's perceptions and beliefs about the color of things are "illusions" and do not accurately represent the way things are in the world as it is independently of us. Arguing that no such conclusion could be consistently reached, Stroud finds that the conditions of a successful unmasking of color cannot all be fulfilled. The discussion extends beyond color to present a serious challenge to many other philosophical attempts to discover the way things really are. A model of subtle, elegant, and rigorous philosophical writing, this study will attract a wide audience from all areas of philosophy

Abstract: This article was written as a commentary on a target article by Peter W. Ross entitled "The Location Problem for Color Subjectivism" [Consciousness and Cognition 10(1), 42-58 (2001)], and is published together with it, and with other commentaries and Ross's reply. If you or your library have the necessary subscription you can get PDF versions of the target article, all the commentaries, and Ross's reply to the commentaries here. However, I do not think that it is by any means essential for you to have read Ross's piece in order to understand this one. Ross defends a view called "color physicalism" or color realism that holds (simplifying somewhat) that colors are real physical properties (in typical cases, spectral reflectances of object surfaces). This is in opposition to what is probably a more widely held "subjectivist" view of color, holding that color qualities really exist only in the mind. In my commentary I suggest that a realist view of qualitative properties, such as Ross's, together with a direct, active view of perception, and a concept of "extended mind" (Clark & Chalmers, 1998) may provide the materials for a real solution to the notorious hard problem of consciousness. I sketch this solution in outline. - N.J.T.T

Abstract: According to color realism, object colors are mind-independent properties that cover surfaces or permeate volumes of objects. In recent years, some color scientists and a growing number of philosophers have opposed this view on the grounds that realism about color cannot accommodate the apparent unitary/binary structure of the hues. For example, Larry Hardin asserts, the unitary-binary structure of the colors as we experience them corresponds to no known physical structure lying outside nervous systems that is causally involved in the perception of color. This makes it very difficult to subscribe to a color realism that is supposed to be about red, green, blue, black, and white—that is, the colors with which we are perceptually acquainted.1 Similarly, Evan Thompson says

Abstract: A chip looks true blue to John and greenish blue to Jane. On the face of it, at least one of the two perceivers has an inaccurate colour experience; for the chip cannot be both true blue and greenish blue. But John and Jane are “normal” perceivers, and there is no privileged class of normal perceivers (Block 1999). This is the puzzle of true blue (Tye