Examine source code of mojave dark

{
  "name": "mojave dark",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "macOS-Catalina-Dark-Mode.jpg"
    },
    "colors": {
      "frame": "rgb(28, 35, 43)",
      "tab_background_text": "rgba(92, 119, 149, 1)",
      "toolbar": "rgb(29, 36, 43)",
      "bookmark_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(29, 36, 43)",
      "toolbar_field_text": "rgb(255, 255, 255)"
    }
  }
}