Examine source code of Swedutch

{
  "name": "Swedutch",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "theme header.jpg"
    },
    "colors": {
      "toolbar": "rgba(19, 44, 237, 1)",
      "toolbar_field_text": "rgba(232, 16, 42, 1)",
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(232, 225, 16, 1)"
    }
  }
}