1. A non-transitory computer-readable storage medium having stored thereon a display control program to be executed by a computer of a display control apparatus that displays an image on a display device, the display control program causing the computer to perform functionality comprising: acquiring a captured image captured by a real camera; detecting at least one pixel having specific range color information in color information including at least one selected from the group including RGB values, a hue, a saturation, and a brightness in the acquired captured image; generating, on the basis of the specific range color information of the at least one detected pixel, an image of an object to be placed in a virtual world; generating a combined image obtained by combining the acquired captured image with a virtual world image in which the object placed in the virtual world is viewed from a virtual camera; generating an image of the virtual world, in which the object is viewed from the virtual camera, as the virtual world image by placing the object in the virtual world such that, in accordance with a detection position where the at least one pixel having the specific range color information has been detected in the captured image, the image of the object in the virtual world image is combined with the captured image so as to overlap the detection position; p 1 detecting the motion of the real camera and setting a position and a capturing direction of the virtual camera by imparting the same motion as the motion of the real camera to the virtual camera; after generating the virtual world image in which the object is placed in the virtual world, generating, as the virtual world image, an image of the virtual world, in which the object is viewed from the virtual camera; and displaying the combined image on the display device.