1. An image outputting apparatus that outputs an image comprising: a color image obtaining unit configured to obtain a color image having multiple colors; a monochrome image generating unit configured to generate a monochrome image having portions of a predetermined color of the color image that are darker than portions of the color image which are black by performing a predetermined color-highlighting monochromization process on the color image; and a monochrome image outputting unit configured to output the generated monochrome image.