Examine source code of Polygons - Orange

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#333333"
    }
  },
  "version": "2.0",
  "name": "Polygons",
  "manifest_version": 2,
  "description": "A simple polygon theme made with my tools which can be found <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/26a1ce5ead8456e65580130714869704593ba6126e7afbffa25f8eac2be92115/http%3A//jsfiddle.net/62h9gnnb/5/\" title=\"Polygon Background Generator\">here</a>."
}