Different colors of taxi cabs can be observed in different countries; some taxis are black in color and can be differentiate from the other vehicles through their taxi sign on top of the cab. Philippine taxis are white in color while in New York green taxis are becoming more popular. But some people in New York still opt for the old yellow cabs. Then in the airport of New York there are orange and white or combination of green and yellow color taxi. Yellow cabs would always remain in one's mind if talking about taxi; and that was proven to have that image although a lot of colors have already been used for taxi cabs.
In their explanation on the color of yellow cabs, Melbourne transport professionals state that it will always be the typical pattern for some reasons. First, is its distinguishable color that can be easily be spotted by commuters and be hired. Second is for people to refuse car with yellow color so not to be mistaken as taxi which is indeed very embarrassing. The third reason is that, based on the study in University of Chicago, a yellow colored cab with a bit of red is very effective in the event where visibility is low, like if having a bad weather. So even if the cab is still far and because of its color, people can already see that a taxi cab is coming.
At any rate, these reasons still have one bottom-line, which is the matter of being recognized. And it also shows that yellow color has been able to retain its importance in showing the benefit of being the best choice when it comes to means of transport.