Every person chooses colors that best fit his character. It relates to almost all spheres of our life.
Thus you may find out some steaks of your admirer judging by the color of his car (of course if he has the latter).

White color is chosen by idealists, classics lovers, admirers of eternal love. It's a capital aesthete, a modest factory worker, a taciturn fan of reading books at leisure who may drive a white car. When on road these people are, as a rule, neat, following road laws. If one day you will see a white car owner driving reckless, be sure he has a sound ground for it!

Those who prefer yellow color cars are big optimists. They wait for happiness to fall upon them unexpectedly. Such people like to live by tomorrow, they are not interested in the past, neither in the present. That's why they may seem a bit out-of-body. Keep aloof from yellow cars on road, they may not notice you.

People, choosing blue color cars, are psychologically mature.