Examine source code of Penguin Skate

{
  "manifest_version": 2,
  "version": "3.0",
  "name": "Penguin Skate",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "left top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(251, 251, 251, 0.12)",
      "toolbar_field": "rgba(165, 253, 255, 0)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(211, 254, 255)",
      "popup": "rgb(101, 209, 211)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(211, 254, 255)",
      "bookmark_text": "rgb(0, 0, 0)",
      "frame": "rgb(101, 209, 211)",
      "tab_background_text": "rgb(0, 0, 0)"
    }
  }
}