Examine source code of river isar 3

{
  "theme": {
    "images": {
      "theme_frame": "isar7a.jpg"
    },
    "colors": {
      "frame": "#664124",
      "tab_background_text": "#40240f"
    }
  },
  "version": "2.0",
  "name": "river isar 3",
  "manifest_version": 2,
  "description": "the river isar in germany, near Vorderriss, july 2010"
}