Examine source code of Cydog Emperor

{
  "name": "Cydog Emperor",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "morons.png"
    },
    "colors": {
      "frame": "rgb(4, 4, 205)",
      "tab_background_text": "rgba(230, 230, 230, 1)",
      "toolbar": "rgb(6, 5, 25)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(4, 4, 205, 1)",
      "toolbar_field_text": "rgba(230, 230, 230, 1)"
    }
  }
}