Examine source code of Emscher River

{
  "theme": {
    "images": {
      "theme_frame": "EmscherAue.jpg"
    },
    "colors": {
      "frame": "#088028",
      "tab_background_text": "#ede1e1"
    }
  },
  "version": "2.0",
  "name": "Emscher River",
  "manifest_version": 2,
  "description": "River Emscher Aue Ruhrgebiet"
}