Happiness is merely a black-and-white issue to color-researcher Max L(infinity)scher; it can be easily achieved by the ""Four-Color Person"" who properly balances all his color-keyed ""senses of self""--stable self-respect (green), open-minded self-development (yellow), active self-confidence (red), and contented self-moderation (blue). Color, according to the Swiss functional psychologist, is the language of feelings. Through use of the L(infinity)scher Color Test, which involves choosing one's most- and least-liked colors from a four-color disk, a psychologist can infer one's inner sense of self. A person who favors red, for example, tends to be a Robinson Crusoe-type who has a pioneering spirit rooted in strong self-confidence. Interestingly enough, the utopian Four-Color Person is positioned nowhere on the color disk; he lives in the complete spectrum of emotions and follows no discernible behavior pattern. In addition to drawing the Four-Color Person, the book churns out 32 thumbnail sketches of non-four-color people--the good-natured angel, the conceited peacock, the tortured martyr--and offers pedantic suggestions for thinking with a (balanced) four-color attitude. L(infinity)scher's rainbow is harmlessly diverting though we doubt it leads to a pot of gold.