Tiffany blue is beautiful. Tiffany Blue (English: Tiffany Blue) is the common name for the color owned by the New York jewelry company Tiffany, which is a lighter robin egg blue. In 1845, Tiffany & Co. first used it on the cover of Tiffany's Blue Book. Since then, Tiffany & Co. has widely used Tiffany Blue on materials including gift boxes and bags and other company promotional items.