Examine source code of Purple

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(14, 17, 23)",
      "toolbar_text": "rgb(225, 228, 232)",
      "frame": "rgb(51, 40, 66)",
      "tab_background_text": "rgb(225, 228, 232)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(132, 87, 224)",
      "tab_line": "rgba(178, 155, 224, 0.43)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(51, 40, 66)",
      "tab_loading": "rgba(178, 155, 224, 0.43)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0144d433-9c72-44a8-924f-0bb543ab330f}"
    }
  }
}