Examine source code of Mansion

{
  "name": "Mansion",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Desert_Droid_Star_Wars_1920x1080.jpg"
    },
    "colors": {
      "frame": "rgba(128, 128, 128, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(199, 162, 137, 1)",
      "bookmark_text": "rgba(15, 13, 13, 1)",
      "toolbar_field": "rgba(220, 229, 250, 1)",
      "toolbar_field_text": "rgba(43, 34, 34, 1)"
    }
  }
}