Examine source code of Test Nova

{
  "name": "Test Nova",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "arriere plan megaton.png"
    },
    "colors": {
      "toolbar": "rgba(242, 193, 147, 1)",
      "frame": "rgba(230, 133, 40, 1)",
      "tab_background_text": "rgba(82, 17, 40, 1)",
      "bookmark_text": "rgba(42, 9, 21, 1)"
    }
  }
}