Examine source code of LEGEND

{
  "name": "LEGEND",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "15499055754227099372806319560290.jpg"
    },
    "colors": {
      "toolbar": "rgba(195, 196, 199, 0.59)",
      "toolbar_field": "rgba(18, 46, 17, 1)",
      "toolbar_field_text": "rgba(35, 148, 41, 1)",
      "frame": "rgba(20, 66, 57, 1)",
      "tab_background_text": "rgba(51, 128, 49, 1)",
      "bookmark_text": "rgba(3, 2, 5, 1)"
    }
  }
}