Examine source code of Grandson

{
  "name": "Grandson",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "vons.jpg"
    },
    "colors": {
      "frame": "rgba(14, 82, 230, 1)",
      "tab_background_text": "rgba(8, 8, 15, 1)",
      "toolbar": "rgba(169, 163, 209, 1)",
      "bookmark_text": "rgba(19, 8, 240, 0.32)",
      "toolbar_field": "rgba(247, 237, 247, 0.97)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  }
}