1. A color chart detection apparatus that detects a color chart from an image representing the color chart, the color chart including a plurality of palettes arranged in a predefined order, the apparatus comprising: a processor configured to: extract, for each of a predetermined number, not smaller than three, of palettes selected from among the plurality of palettes, any pixel having a color component corresponding to the palette from the image; select at least three palettes from the predetermined number of palettes to form a first group, color components of the palettes included in the first group being different from each other, detect, when a combination of pixels selected on a palette-by-palette basis from among the pixels extracted for the respective palettes included in the first group is arranged in accordance with the predefined order, each of the pixels included in the combination as being a first candidate pixel; and compute, based on the first candidate pixel, color information representing color of the palette corresponding to the first candidate pixel on the image and position information representing position of the corresponding palette on the image.