Examine source code of Happy Halloween Ghost

{
  "name": "Happy Halloween Ghost",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "HappyHalloweenGhostH.jpg"
    },
    "colors": {
      "frame": "rgba(2, 32, 51, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(2, 31, 51, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(2, 31, 51, 0.05)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(237, 237, 237, 1)"
    }
  }
}