Examine source code of Dark Blue Snark Hunt

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Dark Blue Snark Hunt",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 213, 203, 0.25)",
      "toolbar_text": "rgb(222, 198, 194)",
      "frame": "rgb(29, 31, 46)",
      "tab_background_text": "rgb(222, 198, 194)",
      "toolbar_field": "rgb(231, 204, 180)",
      "toolbar_field_text": "rgb(29, 31, 46)",
      "tab_line": "rgb(231, 204, 180)",
      "popup": "rgb(29, 31, 46)",
      "popup_text": "rgb(222, 198, 194)",
      "ntp_text": "rgb(240, 240, 240)",
      "popup_border": "rgb(128, 128, 128)",
      "sidebar_border": "rgb(160, 160, 160)",
      "tab_loading": "rgb(231, 204, 180)"
    }
  }
}