Examine source code of purple

{
  "manifest_version": 3,
  "name": "purple",
  "version": "1.1",
  "description": "purple.",
  "browser_specific_settings": {
    "gecko": {
      "id": "purple@ohsopurple"
    }
  },
  "icons": {
    "48": "icons/48.png"
  },
  "theme": {
    "colors": {
      "frame": "#13052a",
      "tab_background_text": "#817590",
      "tab_line": "#370974",
      "toolbar": "#21044a",
      "toolbar_text": "#8f71be",
      "toolbar_field": "#13052a",
      "toolbar_field_separator": "#370974",
      "toolbar_field_text": "#817590",
      "toolbar_field_border": "#21044a",
      "toolbar_field_border_focus": "#21044a",
      "tab_background_separator": "#13052a",
      "popup": "#21044a",
      "popup_highlight": "#370974",
      "popup_text": "#817590",
      "popup_border": "#370974"
    },
    "properties": {
      "content_alignment": "center",
      "background_repeat": "no-repeat"
    }
  }
}