If you want to deter car thieves, get a car with an unusual color. So says the Family Home Security blog, citing a study out of the Netherlands.
Here's the theory: since thieves value quick resale of a stolen car, look for colors that are unusual, like pink. In the cited study, black and silver were the two most-stolen colors. The researcher suggested that an uncommon car color, if you can put up with it, might be at least as good a deterrent as an expensive car alarm.