Examine source code of Vintage Edition

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Vintage Green",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-034-6d9669d30498557e7b5a2db5ecb286d0.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(49, 56, 72, 0.85)",
      "toolbar_text": "rgb(172, 198, 170)",
      "frame": "rgb(49, 56, 72)",
      "tab_background_text": "rgb(149, 168, 147)",
      "toolbar_field": "rgb(172, 198, 170)",
      "toolbar_field_text": "rgb(49, 56, 72)",
      "tab_line": "rgb(172, 198, 170)",
      "popup": "rgb(49, 56, 72)",
      "popup_text": "rgb(172, 198, 170)",
      "tab_loading": "rgb(172, 198, 170)"
    }
  }
}