In the 1960s, New York City passed a law to make yellow the official color for all licensed taxis, to help people more easily tell the difference between legal medallion taxis and illegal cabs. However, the story began much earlier, back to 1915, when John Hertz, founder of the Yellow Cab Company, decided to paint his taxis yellow. He did so because a study by a local university found that yellow, especially with a hint of red, was the most visible color from a distance. Some stories suggest that yellow’s connection to transportation goes back even further, with Italy’s 15th-century postal vehicles being among the first to use the color.
Source: Supercar Blondie
