Examine source code of Deep indigo sky

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Deep indigo sky",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(25, 8, 57)",
      "toolbar_text": "rgb(145, 122, 255)",
      "frame": "rgb(7, 7, 43)",
      "tab_background_text": "rgb(145, 122, 255)",
      "toolbar_field": "rgb(45, 31, 90)",
      "toolbar_field_text": "rgb(145, 122, 255)",
      "tab_line": "rgb(45, 31, 90)",
      "popup": "rgb(45, 31, 90)",
      "popup_text": "rgb(145, 122, 255)",
      "tab_loading": "rgb(45, 31, 90)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d6f87e43-e14e-4efb-b6dd-1e11b89c8e40}"
    }
  }
}