The test colors from the Lüscher Color-Diagnosis chosen based on favoritism. The test-taker chooses the card color they like best and then orders the rest from most-preferred to lease-preferred. Numbers are printed on the backside of each card, and after the test-taker orders them, the examiner turns them over and references an accompanying book that contains all of the different number combinations and their meaning. Lüscher argues that the subject's choice of color shows the state of their psychosomatic and emotional status and how they feel about themselves.