"II The Lanham Act gives a seller or producer the exclusive right to “register” a trademark, 15 U.S.C. § 1052 (1988 ed. and Supp. V), and to prevent his or her competitors from using that trademark, § 1114(1). Both the language of the Act and the basic underlying principles of trademark law would seem to include color within the universe of things that can qualify as a trademark. The language of the Lanham Act describes that universe in the broadest of terms. It says that trademarks “include any word, name, symbol, or device, or any combination thereof.” § 1127. Since human beings might use as a “symbol” or “device” almost anything at all that is capable of carrying meaning, this language, read literally, is not restrictive. The courts and the Patent and Trademark Office have authorized for use as a mark a particular shape (of a Coca-Cola bottle), a particular sound (of NBC’s three chimes), and even a particular scent (of plumeria blossoms on sewing thread). See, e.g., Registration No. 696,147 (Apr. 12, 1960); Registration Nos. 523,616 (Apr. 4, 1950) and 916,522 (July 13, 1971); In re Clarke, 17 U.S.P.Q.2d 1238, 1240 (TTAB 1990). If a shape, a sound, and a fragrance can act as symbols why, one might ask, can a color not do the same?\n\n341 A color is also capable of satisfying the more important part of the statutory definition of a trademark, which requires that a person “use” or “intend to use” the mark “to identify and distinguish his or her goods, including a unique product, from those manufactured or sold by others and to indicate the source of the goods, even if that source is unknown.” 15 U.S.C. § 1127. True, a product’s color is unlike “fanciful,” “arbitrary,” or “suggestive” words or designs, which almost automatically tell a customer that they refer to a brand. Abercrombie & Fitch Co. v. Hunting World, Inc., 537 F.2d 4, 9-10 (CA2 1976) (Friendly, J.); see Two Pesos, Inc. v. Taco Cabana, Inc., 505 U.S. — -, — -, 112 S.Ct. 2753, 2757, 120 L.Ed.2d 615 (1992). The imaginary word “Suntost,” or the words “Suntost Marm alade,” on a jar of orange jam immediately would signal a brand or a product “source”; the jam’s orange color does not do so. But, over time, customers may come to treat a particular color on a product or its packaging (say, a color that in context seems unusual, such as pink on a firm’s insulating material or red on the head of a large industrial bolt) as signifying a brand. And, if so, that color would have come to identify and distinguish the goods – i.e. “to “indicate” their “source” – much in the way that descriptive words on a product (say, “Trim” on nail clippers or “Car - Freshner” on deodorizer) can come to indicate a product’s origin. See, e.g., J. Wiss & Sons Co. v. W.E. Bassett Co., 59 C.C.P.A. 1269, 1271 (Pat.), 462 F.2d 567, 569 (1972); Car-Freshner Corp. v. Turtle Wax, Inc., 268 F.Supp. 162, 164 (SDNY 1967). In this circumstance, trademark law says that the word ( e.g., “Trim”), although not inherently distinctive, has developed “secondary meaning.” See Inwood Laboratories, Inc. v. Ives Laboratories, Inc., 456 U.S. 844, 851, n. 11, 102 S.Ct. 2182, 2187, n. 11, 72 L.Ed.2d 606 (1982) (“secondary meaning” is acquired when “in the minds of the public, the primary significance of a product feature … is to identify the source of the product rather than t he product itself”). Again, one might ask, if trademark law permits a descriptive word with secondary meaning to act as a mark, why would it not permit a color, under similar circumstances, to do the same?\n\n342 We cannot find in the basic objectives of trademark law any obvious theoretical objection to the use of color alone as a trademark, where that color has attained “secondary meaning” and therefore identifies and distinguishes a particular brand (and thus indicates its “source”). In principle, trademark law, by preventing others from copying a source- identifying mark, “reduces the customer’s costs of shopping and making purchasing decisions,” 1 J. McCarthy, McCarthy on Trademarks and Unfair Competition § 2.012, p. 2-3 (3d ed. 1994) (hereinafter McCarthy), for it quickly and easily assures a potential customer that this item – the item with this mark – is made by the same producer as other similarly marked items that he or she liked (or disliked) in the past. At the same time, the law helps assure a producer that it (and not an imitating competitor) will reap the financial, reputation-related rewards associated with a desirable product. The law thereby “encourages the production of quality products,” ibid., and simultaneously discourages those who hope to sell inferior products by capitalizing on a consumer’s inability quickly to evaluate the quality of an item offered for sale. See, e.g., 3 L. Altman, Callmann on Unfair Competition, Trademarks and Monopolies § 17.03 (4th ed. 1983); Landes & Posner, The Economics of Trademark Law, 78 T.M. Rep. 267, 271-272 (1988); Park ‘N Fly, Inc. v. Dollar Park and Fly, Inc., 469 U.S. 189, 198, 105 S.Ct. 658, 663, 83 L.Ed.2d 582 (1985); S.Rep. No. 100-515, p. 4 (1988) U.S.Code Cong. & Admin.News, 1988, pp. 5577, 5580. It is the source-distinguishing ability of a mark – not its ontological status as color, shape, fragrance, word, or sign – that permits it to serve these basic purposes. See Landes & Posner, Trademark Law: An Economic Perspective, 30 J.Law & Econ. 265, 290 (1987). And, for that reason, it is difficult to find, in basic trademark objectives, a reason to disqualify absolutely the use of a color as a mark."