Examine source code of Zero Dark Gold

{
  "name": "Zero Dark Gold",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "blank-png-background-2.png"
    },
    "colors": {
      "frame": "rgba(23, 23, 23, 1)",
      "tab_background_text": "rgba(89, 59, 0, 1)",
      "toolbar": "rgba(30, 30, 30, 1)",
      "bookmark_text": "rgba(249, 166, 2, 1)",
      "toolbar_field": "rgba(249, 166, 2, 0.08)",
      "toolbar_field_text": "rgba(249, 166, 2, 1)"
    }
  }
}