1. A color-coded target comprising, on a surface thereof: a position detecting pattern for indicating a position to be measured; a reference color pattern having a unit area tinted in a color for use as a color reference; and a color code pattern having a plurality of unit areas tinted in different colors for discriminating said target, wherein the different colors of said color code pattern are arranged so that adjacent colors in the HSI color space are different in at least one of hue, saturation, and intensity by a specified value or greater; and said reference color pattern is suitable for use for correcting color divergence in said color code pattern.