Examine source code of Surface Lake

{
  "name": "Lake Blue",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Lake-blue.png"
    },
    "colors": {
      "frame": "rgba(157, 163, 217, 1)",
      "tab_background_text": "rgba(97, 143, 224, 1)",
      "toolbar": "rgba(17, 84, 99, 1)",
      "bookmark_text": "rgba(163, 114, 83, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8046dfca-1fd0-47a4-8a27-0df4ccfc3ac4}"
    }
  }
}