Examine source code of PlagueV01

{
  "name": "Skaven",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Skaven.jpg"
    },
    "colors": {
      "frame": "rgba(38, 39, 30, 1)",
      "tab_background_text": "rgba(38, 39, 30, 1)",
      "toolbar": "rgba(38, 39, 30, 1)",
      "bookmark_text": "rgba(174, 215, 109, 1)",
      "toolbar_field": "rgba(38, 39, 30, 1)",
      "toolbar_field_text": "rgba(174, 215, 109, 1)"
    }
  }
}