Examine source code of Millau Viaduct

{
  "name": "Millau Viaduct",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "viadukt von millau.jpg"
    },
    "colors": {
      "frame": "rgba(206, 216, 235, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(125, 125, 125, 0.51)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(224, 224, 224, 1)",
      "toolbar_field_text": "rgba(79, 79, 79, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  }
}