Examine source code of Blue Polygon

{
  "name": "Blue Polygon",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "PS4Wallpapers.com_polygon-colors.jpg"
    },
    "colors": {
      "frame": "rgba(0, 81, 255, 1)",
      "tab_background_text": "rgba(91, 93, 207, 1)",
      "toolbar": "rgba(26, 0, 255, 0.33)",
      "bookmark_text": "rgba(0, 170, 255, 0.68)",
      "toolbar_field": "rgba(0, 187, 255, 0.36)",
      "toolbar_field_text": "rgba(82, 128, 255, 1)"
    }
  }
}