Examine source code of city aesthetics

{
  "name": "city aesthetics",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "04ffef82-be19-48ea-a6bc-81299a4f8fef.gif"
    },
    "colors": {
      "frame": "rgba(4, 25, 21, 1)",
      "tab_background_text": "rgba(47, 67, 52, 1)",
      "toolbar": "rgba(15, 77, 48, 0.18)",
      "bookmark_text": "rgba(47, 67, 52, 1)"
    }
  }
}