Examine source code of Magellan Nebula

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Magellan Nebula",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(79, 82, 64, 0)",
      "toolbar_text": "rgb(196, 196, 196)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(179, 179, 179)",
      "toolbar_field": "rgba(13, 13, 28, 0.67)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(165, 146, 14)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(217, 222, 229)",
      "button_background_active": "rgb(195, 192, 192)",
      "tab_loading": "rgb(165, 146, 14)"
    }
  }
}