Visual answer
Why yellow taxis stand out
The diagram connects city visual clutter, color visibility, fleet branding, and regulation to explain why yellow became the taxi color in many places.
High visibility
Yellow is easy to notice against roads, buildings, and ordinary car colors.
Fleet identity
A matching color helped riders recognize taxis quickly from the street.
City rule
In some cities, regulation turned a useful brand choice into a standard.
The Story
One Entrepreneur, One Study, and a Very Yellow Fleet
Current state
In 1915, a Chicago businessman named John Hertz was building what would become one of the first large-scale taxi companies in America. He needed a way to make his cabs instantly recognisable on busy city streets. A researcher at the University of Chicago had recently completed a study on colour perception and distance visibility. The conclusion: yellow is the colour the human eye picks out most easily from far away.
What supports this
Hertz painted his entire fleet yellow and called it the Yellow Cab Company. The idea worked so well that competitors and cities across America gradually followed. New York City eventually made yellow the mandatory colour for licensed medallion taxis in 1967, cementing the association so firmly that 'yellow cab' and 'taxi' became virtually synonymous in American culture.
What could change this
The rise of ride-hailing apps like Uber and Lyft has softened the dominance of yellow taxis in many cities, as passengers no longer need to spot a cab from the pavement. But the visual association is so deeply embedded that yellow cabs remain a shorthand for 'city taxi' in films, illustrations and signage around the world.
Why Yellow Works
Think of It Like a High-Vis Jacket
The familiar part
Construction workers wear bright yellow or orange high-visibility jackets. It's not a fashion choice, it's because those colours jump out of a visually busy background faster than almost anything else.
How it applies
A yellow taxi on a grey city street works on exactly the same principle. Your eyes are constantly scanning for things that matter. A bright, unusual colour, especially yellow, which doesn't appear much on buildings, roads or most other vehicles, triggers that scan almost automatically.
Where the analogy breaks
In cities where everything is already brightly coloured, yellow loses its advantage. And in a world where you summon a car through your phone, the whole visibility problem disappears, which is partly why new taxi companies often choose any colour they like.
Final insight
Visible by Design
Yellow taxis are yellow for the same reason fire engines are red and road workers wear orange, not for style, but because humans need to see important things quickly. The colour is doing a job. It just happens to have become an icon along the way.
Quick answers
Common questions
Are taxis yellow in every country? +
No. London's famous taxis are black. Many countries use white, and some use no standard colour at all. Yellow is mainly associated with North American taxis, though the influence has spread widely through popular culture.
Is the same John Hertz from the car rental company? +
Yes, the very same. John Hertz founded the Yellow Cab Company and later founded Hertz car rental. He had a talent for seeing how people needed to move around cities.
