Examine source code of Kat Skull

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Kat Skull",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(194, 194, 194)",
      "frame": "rgb(8, 8, 8)",
      "tab_background_text": "rgb(204, 204, 204)",
      "toolbar_field": "rgb(63, 63, 64)",
      "toolbar_field_text": "rgb(133, 133, 134)",
      "tab_line": "rgb(167, 4, 2)",
      "popup": "rgb(5, 5, 5)",
      "popup_text": "rgb(231, 231, 231)",
      "tab_loading": "rgb(167, 4, 2)"
    }
  }
}