Examine source code of CE-farben.de

{
  "name": "CE-farben.de",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Ohne Titel.jpg"
    },
    "colors": {
      "toolbar": "rgba(143, 127, 127, 0.8)",
      "toolbar_field": "rgba(242, 225, 225, 1)",
      "toolbar_field_text": "rgba(13, 8, 8, 1)",
      "frame": "rgba(233, 236, 242, 1)",
      "tab_background_text": "rgba(237, 246, 247, 1)",
      "bookmark_text": "rgba(220, 237, 235, 1)"
    }
  }
}