Taxis are a different color everywhere, there's no "standard," even NYC has green taxis ("Boro Taxis"). Yellow is a popular color, because it stands out, but I've taken taxis every color of the rainbow (well, maybe not pink or purple), each area or company is different.
In my neighborhood two companies operate taxis, one has a fleet of red taxis and another has a fleet of blue taxis. From my observation, black is probably the second most common taxi color.
You identify a taxi by it's markings, not it's color.
Taxis are a different color everywhere, there's no "standard," even NYC has green taxis ("Boro Taxis"). Yellow is a popular color, because it stands out, but I've taken taxis every color of the rainbow (well, maybe not pink or purple), each area or company is different.
In my neighborhood two companies operate taxis, one has a fleet of red taxis and another has a fleet of blue taxis. From my observation, black is probably the second most common taxi color.
You identify a taxi by it's markings, not it's color.