Examine source code of Zombie Cake

{
  "name": "Zombie Cake",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "0001.jpg"
    },
    "colors": {
      "frame": "#d1241b",
      "tab_background_text": "rgba(143, 255, 206, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(211, 255, 199, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.1)",
      "toolbar_field_text": "rgba(208, 222, 205, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  }
}