The color grey permeates District 13, symbolizing the suppression of individuality for the greater good. Katniss struggles to maintain her identity in this monochromatic world. Experience this struggle by reading the Mockingjay PDF. The stark contrast between the colorful Capitol and the grey rebellion is best experienced through the vivid writing. Digital reading allows you to focus purely on the words and the images they conjure. It is a visual novel without pictures.