The present study considers a fuzzy color system in which three membership functions are constructed on a tone triangle. This system can process a fuzzy input to a tone triangle system and output the center of gravity of three weights associated with respective grades. Three fuzzy sets (not black, white) are applied to the tone triangle relationship. By treating the attributes of chromaticness, whiteness, and blackness on the tone triangle, a target color can be easily obtained as the center of gravity of the output fuzzy set. In the present paper, the 0% triangle consists of lines of 0% chromaticness, 0% whiteness, and 0% blackness. The colors on the 0% triangle map into the right corner of the tone triangle (on or near C). The difference between the resulting inference output and the transforming output is shown by the nonlinear characteristic between the redness ro of the output (consequent) and the chromaticness co of the output (transformation). The vagueness is influenced by the possibility.
