Examine source code of Miku Fish Tank

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Miku Fish Tank",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg",
        "images/2.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.71)",
      "toolbar_text": "rgb(7, 48, 59)",
      "frame": "rgb(182, 184, 185)",
      "tab_background_text": "rgb(23, 47, 64)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(13, 37, 48)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(22, 47, 64)",
      "button_background_active": "rgb(255, 255, 255)",
      "button_background_hover": "rgb(255, 255, 255)",
      "ntp_background": "rgb(255, 255, 255)",
      "tab_loading": "rgb(13, 37, 48)"
    }
  }
}