Examine source code of Squawk

{
  "name": "Squawk",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "meeting.png"
    },
    "colors": {
      "toolbar": "rgba(68, 52, 161, 0.41)",
      "toolbar_field_text": "rgba(100, 100, 100, 1)",
      "frame": "rgba(69, 53, 161, 1)",
      "tab_background_text": "rgba(214, 214, 214, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)"
    }
  }
}