Examine source code of Fun Retro

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Fun Retro",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-014-1586da559b26f11cd37804ee9347a16b.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(13, 43, 45, 0.8)",
      "toolbar_text": "rgb(27, 170, 177)",
      "frame": "rgb(12, 42, 65)",
      "tab_background_text": "rgb(111, 144, 203)",
      "toolbar_field": "rgba(72, 100, 121, 0.2)",
      "toolbar_field_text": "rgb(235, 139, 167)",
      "tab_line": "rgb(28, 171, 176)",
      "popup": "rgb(8, 36, 56)",
      "popup_text": "rgb(235, 139, 167)",
      "tab_loading": "rgb(28, 171, 176)"
    }
  }
}