Examine source code of rustic walnut

{
  "theme": {
    "images": {
      "theme_frame": "rusticwalnut.jpg"
    },
    "colors": {
      "frame": "#f0dc99",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "rustic walnut",
  "manifest_version": 2,
  "description": "Hand Scraped, Hand Beveled and Distressed Rustic Walnut."
}