Examine source code of Vibrant Color Explosion

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Vibrant Color Explosion",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/images.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(223, 223, 244)",
      "toolbar_text": "rgb(81, 81, 78)",
      "frame": "rgb(242, 242, 251)",
      "tab_background_text": "rgb(81, 81, 78)",
      "toolbar_field": "rgb(242, 242, 251)",
      "toolbar_field_text": "rgb(81, 81, 78)",
      "tab_line": "rgb(81, 81, 78)",
      "popup": "rgb(242, 242, 251)",
      "popup_text": "rgb(81, 81, 78)",
      "tab_loading": "rgb(81, 81, 78)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ffb4ba50-ba65-4f47-9eb6-fb104753f365}"
    }
  }
}