Examine source code of Purple Lightning

{
  "name": "MAD As",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Lightning-Network.jpg"
    },
    "colors": {
      "toolbar": "rgba(43, 43, 43, 1)",
      "toolbar_field": "rgba(143, 143, 143, 1)",
      "toolbar_field_text": "rgba(20, 8, 8, 1)",
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(43, 10, 84, 1)",
      "bookmark_text": "rgba(105, 62, 179, 1)"
    }
  }
}