Which company was the first to successfully trademark a specific color as part of their brand identity, setting a precedent for color ownership in retail history?

In the world of retail and product innovation, brand colors play a crucial psychological role in customer perception and purchasing decisions. Some iconic color choices have become so synonymous with their brands that they've been legally protected as 'trade dress' - a revolutionary step in brand identity protection. This poll explores a fascinating case where color innovation intersected with legal precedent to create retail history.

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Tiffany & Co. (robin's egg blue)
Owens-Corning (pink for insulation products)
Coca-Cola (specific shade of red)
UPS (Pullman brown)