Examine source code of Chocolate Cupcakes

{
  "name": "Chocolate Cupcakes",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Chocolate Cupcakes.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(66, 42, 37, 1)",
      "toolbar": "rgba(255, 242, 242, 0)",
      "bookmark_text": "rgba(173, 96, 57, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgba(173, 96, 57, 1)",
      "tab_line": "rgba(250, 209, 149, 1)"
    }
  }
}