Examine source code of Kitty Blue

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Kitty Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "left top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(174, 217, 255, 0.26)",
      "toolbar_field": "rgba(219, 247, 255, 0)",
      "toolbar_field_text": "rgb(31, 89, 138)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(119, 173, 221)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(0, 0, 0)",
      "bookmark_text": "rgb(255, 255, 255)",
      "frame": "rgb(119, 173, 221)",
      "tab_background_text": "rgb(205, 241, 255)"
    }
  }
}