Examine source code of Dark Blue Moon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Blue Moon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(39, 44, 56, 0)",
      "toolbar_text": "rgb(39, 44, 56)",
      "frame": "rgb(80, 139, 210)",
      "tab_background_text": "rgb(39, 44, 56)",
      "toolbar_field": "rgb(39, 44, 56)",
      "toolbar_field_text": "rgb(80, 139, 210)",
      "tab_line": "rgb(39, 44, 56)",
      "popup": "rgb(39, 44, 56)",
      "popup_text": "rgb(80, 139, 210)",
      "icons": "rgb(39, 44, 56)",
      "ntp_background": "rgb(39, 44, 56)",
      "popup_border": "rgba(34, 25, 77, 0)",
      "popup_highlight_text": "rgb(39, 44, 56)",
      "popup_highlight": "rgb(80, 139, 210)",
      "sidebar_border": "rgb(80, 139, 210)",
      "sidebar_text": "rgb(80, 139, 210)",
      "sidebar": "rgb(39, 44, 56)",
      "toolbar_bottom_separator": "rgba(39, 44, 56, 0.37)",
      "toolbar_field_border": "rgb(39, 44, 56)",
      "toolbar_top_separator": "rgba(39, 44, 56, 0.4)",
      "tab_loading": "rgb(39, 44, 56)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a82f54d3-7fde-4c68-89b4-b97d89a52775}"
    }
  }
}