Examine source code of Justice Sought

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#757474",
      "tab_background_text": "#f2f224"
    }
  },
  "version": "2.0",
  "name": "Justice Sought",
  "manifest_version": 2,
  "description": "This is an abstraction based on an early 19th Century Japanese woodblock print. It features a wronged samurai demanding justice from the evil daimyo who murdered his family."
}