Examine source code of shiny Ninetales theme

{
  "name": "Shiny Ninetales",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "shinyninetales.jpg"
    },
    "colors": {
      "toolbar": "rgba(157, 162, 201, 0.69)",
      "toolbar_field": "rgba(0, 0, 0, 0.68)",
      "toolbar_field_text": "rgba(199, 199, 199, 1)",
      "frame": "rgba(164, 182, 219, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(22, 18, 94, 0.85)"
    }
  }
}