Which major retail brand was the first to legally trademark a specific color as part of its brand identity, setting a precedent for 'color ownership' in retail marketing?

The strategic use of color in retail environments has evolved dramatically since the early days of modern retail. What began as simple aesthetic choices has transformed into data-driven decisions backed by psychological research and consumer behavior studies. Retailers now leverage specific colors to influence purchasing decisions, create brand identity, and even guide customer movement through stores. This poll tests your knowledge about a pivotal color-related retail innovation that changed how brands connect with consumers.

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Tiffany & Co. (robin's egg blue)
Qualitex Company (green-gold dry cleaning press pads)
T-Mobile (magenta)
UPS (Pullman brown)