Examine source code of 3D Cubes (Red & Blue)

{
  "name": "3D Cubes (Red & Blue)",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "6771954-awesome-cube-wallpaper.jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(96, 204, 193, 1)",
      "toolbar": "rgba(0, 0, 0, 0.16)",
      "bookmark_text": "rgba(212, 115, 133, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.44)",
      "toolbar_field_text": "rgba(242, 58, 144, 0.68)"
    }
  }
}