Examine source code of Red&Gray #404040

{
  "name": "Red&Gray #404040",
  "manifest_version": 2,
  "version": "1.1",
  "theme": {
    "colors": {
      "frame": "#101010",
      "tab_text": "#800000",
      "tab_background_text": "#808080",
      "toolbar": "#202020",
      "bookmark_text": "#c00000",
      "toolbar_field": "#101010",
      "toolbar_field_text": "#c00000"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c411e7af-92ff-41d8-9a25-dbb0256a89de}"
    }
  }
}