Examine source code of rounding cosmos animated

{
  "name": "rounding cosmos",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "126ea33961233fde2e5c82f1578e951b.gif"
    },
    "colors": {
      "frame": "rgba(3, 18, 48, 1)",
      "tab_background_text": "rgba(242, 233, 233, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(245, 240, 240, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(27, 133, 168, 1)"
    }
  }
}