1. A method to compare images, the method comprising: adjusting, by executing an instruction with a processor, a color histogram associated with an input image based on a first reference color histogram associated with a first reference image to determine a first adjusted color histogram associated with the input image; comparing, by executing an instruction with the processor, the first adjusted color histogram and the first reference color histogram to determine whether the first reference image matches the input image; and displaying, by executing an instruction with the processor, a version of the first reference image adjacent to a display of the input image in response to determining that the first reference image matches the input image.