Examine source code of Engineer Blueprints

{
  "theme": {
    "images": {
      "theme_frame": "EngineerHeader.png"
    },
    "colors": {
      "frame": "#183147",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Engineer Blueprints",
  "manifest_version": 2,
  "description": "Another TF2 related persona, this time Engineer! Created from this wallpaper: \n<a href=\"https://outgoing.prod.mozaws.net/v1/1a1603fec8e9431c8cd01269d33bb978aa328dacf870faabcd87b719cda0ecee/http%3A//wiki.teamfortress.com/wiki/File%3AEngineerBluprints.jpg\" rel=\"nofollow\">http://wiki.teamfortress.com/wiki/File:EngineerBluprints.jpg</a>\n\nEnjoy!"
}