1. A mobile terminal comprising: a camera; a transparent display configured to display an infonnation object which has a first color tone, wherein a surrounding environment of the transparent display is seen via the transparent display; a sensing unit configured to detect a color tone of a subject; and a controller configured to: display the information object on the transparent display while the subject is seen via the transparent display; capture an image of the subject via the camera; detect whether or not the information object on the transparent display overlaps with the image of the subject via the transparent display; detect, via the sensing unit, a color tone of the image of the subject being captured by the camera when the information object on the transparent display overlaps with the image of the subject via the transparent display; compare the first color tone of the information object displayed on the transparent display with the color tone of the image of the subject being captured; when the color tone of the image of the subject is in a same color group as the first color tone of the information object, identify an overlapping region of the information object overlapping with the image of the subject; and change a color tone of the overlapping region of the information object into a second color tone from the first color tone such that the information object is distinguished from the image of the subject seen via the transparent display while the image of the subject is seen via the transparent display, wherein a region displaying the information object other than the overlapping region maintains the first color tone, and wherein a shape of the information object is maintained although the color tone of the overlapping region of the information object is changed into the second color tone from the first color tone.