1. An image processing apparatus comprising: a determining unit configured to determine a color of a character; a color converting unit configured to convert color data into two-color data having a black color and a predetermined color based on the color of the character; and a processing unit configured to process a black character determined by the determining unit, wherein the color converting unit is configured to convert a chromatic color having a predetermined hue into the predetermined color and a chromatic color having a hue other than the predetermined hue and an achromatic color into the black color, and the processing unit is configured to perform a predetermined process on the black character such that the color character having the chromatic color converted into the black color is relatively noticeable to the black character.