Examine source code of Ribblehead Viaduct

{
  "theme": {
    "images": {
      "theme_frame": "ribblehead1header.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Ribblehead Viaduct",
  "manifest_version": 2,
  "description": "The famous Ribblehead Viaduct on the Settle-Carlisle railway line in the Yorkshire Dales."
}