Examine source code of Subnautic

{
  "name": "Subnautic",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "pat-presley-lostriver-ghosttree.jpg"
    },
    "colors": {
      "frame": "rgba(76, 54, 217, 1)",
      "tab_background_text": "rgba(6, 127, 207, 1)",
      "toolbar": "rgba(212, 19, 19, 0)",
      "bookmark_text": "rgba(6, 127, 207, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgba(76, 54, 217, 1)"
    }
  }
}