Examine source code of circe 1911

{
  "name": "circe 1911",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "circe 1911.jpg"
    },
    "colors": {
      "frame": "rgba(32, 45, 35, 1)",
      "tab_background_text": "rgba(31, 31, 31, 1)",
      "toolbar": "rgba(5, 5, 5, 1)",
      "bookmark_text": "rgba(32, 45, 35, 1)",
      "toolbar_field": "rgba(31, 31, 31, 1)",
      "toolbar_field_text": "rgba(32, 45, 35, 1)"
    }
  }
}