Examine source code of Scopa

{
  "name": "Scopa!",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Screen Shot 2018-05-28 at 12.52.05 PM.png"
    },
    "colors": {
      "toolbar": "rgba(52, 97, 229, 1)",
      "toolbar_field": "rgba(250, 250, 250, 1)",
      "toolbar_field_text": "rgba(105, 98, 98, 1)",
      "frame": "rgba(52, 97, 229, 1)",
      "tab_background_text": "rgba(183, 214, 244, 1)",
      "bookmark_text": "rgba(250, 250, 250, 1)"
    }
  }
}