Examine source code of Purple Insanity

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple Insanity",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(40, 7, 84)",
      "toolbar_text": "rgb(136, 67, 218)",
      "frame": "rgb(43, 14, 65)",
      "tab_background_text": "rgb(139, 107, 198)",
      "toolbar_field": "rgb(64, 38, 102)",
      "toolbar_field_text": "rgb(213, 188, 255)",
      "tab_line": "rgb(128, 67, 218)",
      "popup": "rgb(42, 7, 84)",
      "popup_text": "rgb(83, 24, 180)",
      "tab_loading": "rgb(128, 67, 218)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d6c84190-7c49-4bee-a78e-af724d1668f2}"
    }
  }
}