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1845, which was first used by Tiffany Company for the cover of Tiffany Blue Book. Since then, Tiffany Blue has been widely used in materials including gift boxes and bags.
It was named Tiffany Blue because it was used by Tiffany for the first time. Tiffany has two miracles that other brands in the world envy but can't replicate. One of them is the well-known film Breakfast at Tiffany's, which is the most successful product placement marketing in history. The other is Tiffany Blue, which is the most successful color marketing in history.
But because Tiffany applied for a color patent, Tiffany Blue can't be found in Pan Tong's color matching system, and anyone can't use it without permission. After 100 years of history, Tiffany Blue has been closely linked with Tiffany. When we see Tiffany, we think of Tiffany Blue. When we see Tiffany Blue, we know it's Tiffany.
References:
Baidu Encyclopedia-Tiffany Blue