1. An information processing apparatus comprising: a display control unit configured to generate a synthesized image by synthesizing an extraction image including a subject and an instruction image representing a first acquisition region from which color information on the subject is acquired and display the synthesized image on a display unit; a subject color information acquisition unit configured to acquire color information on the subject from the first acquisition region represented by the instruction image in the synthesized image; a background color information acquisition unit configured to acquire color information on a background of the subject from a region not including the first acquisition region and a color information non-acquisition region that is adjacent to the first acquisition region and is set in advance; a subject extraction information determination unit configured to determine extraction information of the subject based on the color information on the subject acquired by the subject color information acquisition unit and the color information on the background acquired by the background color information acquisition unit; and a subject extraction information output unit configured to output the extraction information of the subject determined by the subject extraction information determination unit.