Examine source code of Oktoberfest munich

{
  "name": "Oktoberfest munich",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Lebkuchenherz_Header.jpg"
    },
    "colors": {
      "frame": "rgba(120, 52, 96, 0)",
      "tab_background_text": "rgba(64, 32, 64, 1)",
      "toolbar": "rgba(250, 235, 245, 0.67)",
      "bookmark_text": "rgba(64, 32, 64, 1)",
      "toolbar_field": "rgba(250, 235, 245, 0.79)",
      "toolbar_field_text": "rgba(64, 32, 64, 1)"
    }
  }
}