Examine source code of rijksmuseumplein

{
  "theme": {
    "images": {
      "theme_frame": "rijksmuseumpleinheader.JPG"
    },
    "colors": {
      "frame": "#887ddb",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "rijksmuseumplein",
  "manifest_version": 2,
  "description": "This picture is made in Amsterdam. It shows the Van Gogh museum and the Rijksmuseum of Amsterdam."
}