Examine source code of intensive-blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "intensive-blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(15, 5, 150)",
      "toolbar_text": "rgb(9, 88, 109)",
      "frame": "rgb(142, 171, 201)",
      "tab_background_text": "rgb(104, 169, 183)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 10, 217)",
      "tab_line": "rgb(61, 39, 172)",
      "popup": "rgb(199, 201, 255)",
      "popup_text": "rgb(67, 73, 217)",
      "tab_loading": "rgb(61, 39, 172)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{918f8c57-6a60-41bf-a53c-06a7f1b9dfb5}"
    }
  }
}