Which major airline successfully defended its trademark on a specific shade of blue, forcing another transportation company to change its branding in a landmark 2012 legal case?

Color psychology plays a crucial role in transportation branding, creating instant recognition and emotional connections with customers. Major transport companies invest millions in developing and protecting their signature color schemes. This poll tests your knowledge of one of the most famous color disputes in transportation branding history that led to legal proceedings and a significant brand identity shift.

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British Airways' 'Speedmarque Blue' against Eurostar
JetBlue's 'Pantone 299C' against Greyhound Bus Lines
Deutsche Bahn's 'Traffic Red' against Austrian Airlines
Deutsche Lufthansa's 'Lufthansa Blue' against easyJet