Examine source code of Old-Fashioned Study

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Old-Fashioned Study",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(173, 107, 46)",
      "toolbar_text": "rgb(254, 250, 224)",
      "frame": "rgb(96, 108, 56)",
      "tab_background_text": "rgb(254, 250, 224)",
      "toolbar_field": "rgb(254, 250, 224)",
      "toolbar_field_text": "rgb(40, 54, 24)",
      "tab_line": "rgb(254, 250, 224)",
      "popup": "rgb(254, 250, 224)",
      "popup_text": "rgb(40, 54, 24)",
      "tab_loading": "rgb(254, 250, 224)"
    }
  }
}