Examine source code of Google Chrome Dark Grey

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "DarkThemeChrome",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(52, 61, 63)",
      "toolbar_text": "rgb(181, 190, 192)",
      "frame": "rgb(38, 43, 45)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(30, 39, 41)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(52, 61, 63)",
      "popup": "rgb(27, 28, 28)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(52, 61, 63)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{97d16878-e56f-4a3b-8252-8f790e641985}"
    }
  }
}