Examine source code of Moonlight Fog

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Moonlight Fog",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.3)",
      "toolbar_field": "rgba(61, 61, 61, 0.7)",
      "toolbar_field_text": "rgb(161, 161, 161)",
      "tab_line": "rgb(169, 169, 169)",
      "popup": "rgb(39, 39, 39)",
      "popup_text": "rgb(141, 141, 141)",
      "tab_loading": "rgb(169, 169, 169)",
      "bookmark_text": "rgb(169, 169, 169)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(160, 160, 160)"
    }
  }
}