While deciding on the type of car comes easily for most people, deciding on the color of a car can be a stumbling problem. Try Feng Shui: the Chinese guide used for arranging homes can also be used for selecting colors based on an individual's own personal Feng Shui. In Feng Shui, each person has a color that is considered their personal success color. This success color is determined by a number that is based on gender and date of birth. This number, called kua number, is associated with several colors. When you buy your next car, try using personal Feng Shui to select your success color and choose it by your aspiration. To determine the driver's kua number, and subsequently the color of car that is appropriate, enter your birthdate and what you aspire to or want to draw into your life.