Charles Lewis Tiffany understood packaging before packaging was a discipline. When he published his store's first mail-order catalogue — the Blue Book, in 1845 — he wrapped the entire enterprise in a particular shade of robin's-egg blue. The choice may have followed Victorian fashion: turquoise was the era's wedding color, popular for the gemstone and for the ribbons brides wore. Whatever the reason, Tiffany committed to it with unusual discipline. The catalogue was blue. The boxes were blue. The bags were blue. Everything, the same blue, every year, for the next century and a half.
That discipline is the entire story. A color becomes a trademark not by being beautiful but by being consistent — repeated until the public stops seeing a color and starts seeing a source. By the early twentieth century, a small blue box with a white ribbon meant exactly one thing, and the company knew it. A New York newspaper observed as early as 1906 that Tiffany had a rule no amount of money could break: you could not buy one of those boxes empty. The box left the store only with merchandise inside it.
The famous rule, still in force: Tiffany & Co. will not sell its blue box or bag separately. The packaging exists only as the container of a Tiffany purchase — which is precisely what makes it function as a trademark. The box doesn't advertise the product; the box is the proof of source.
A Pantone Number Nobody Else Can Use
In 2001, Tiffany worked with Pantone to standardize the shade once and for all. The result is a custom color: PMS No. 1837, the number chosen for the year Tiffany was founded. It does not appear in the standard Pantone swatch books that designers buy. It is a private, standardized recipe — produced for Tiffany, reserved for Tiffany — so that every box, bag, and storefront on earth comes out the same robin's-egg blue.
Then, in 1998, came the legal layer: Tiffany registered the color itself as a trademark in the United States — not the box shape, not the logo, the color, as applied to its boxes and bags. This was only possible because the Supreme Court had recently settled the question of whether a color alone could ever be a trademark.
The Case That Made Color Ownable
For most of the twentieth century, U.S. courts disagreed about color marks. The skeptics' argument was practical: there are only so many colors, and if companies could each fence one off, competitors would eventually run out — the 'color depletion' theory. The question reached the Supreme Court in 1995 in Qualitex Co. v. Jacobson Products, a dispute over the green-gold color of dry-cleaning press pads.
The Court's answer was unanimous: a color can be a trademark, provided it meets the same test as anything else — it must have acquired secondary meaning, so that consumers seeing the color think of one producer. There would be no special rule against color; there would simply be the ordinary, demanding requirement of proof. Most companies can't meet it. Tiffany, with a century and a half of obsessively consistent blue behind it, is the textbook case of a company that can.
The registrations that exist in this territory are a short and famous list: UPS brown for delivery services, T-Mobile magenta, John Deere green-and-yellow, the Home Depot orange — and Tiffany Blue. Each one represents decades of single-minded consistency converted into a property right.
What Owning a Color Actually Means
Tiffany's registration doesn't pull the shade out of the universe. An artist can paint with robin's-egg blue; a bakery can frost cakes with it. What the trademark forbids is using that color where it would suggest Tiffany as the source — on jewelry boxes, jewelry packaging, retail bags in the luxury goods world. The test, as always in trademark law, is confusion, and the closer a competitor's little blue box comes to the original, the faster the letters from Tiffany's counsel arrive.
The company polices the line vigorously, because it has to: a color mark survives on exclusivity. Every knockoff blue box that goes unchallenged is a small argument that the color no longer points to one source. So the blue is enforced, the Pantone recipe stays locked, and the empty box still cannot be bought at any price — a packaging rule from 1906 doing trademark work in 2026.
Charles Tiffany picked a fashionable color and then refused, for the rest of his life, to pick another one. The refusal turned out to be the asset. The diamonds were always the product — but the thing competitors covet, the thing the law had to invent new doctrine to protect, is the box.