Examine source code of Nier Automata Menu Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nier Automata Menu Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(70, 67, 58)",
      "toolbar_text": "rgb(211, 207, 178)",
      "frame": "rgb(211, 207, 178)",
      "tab_background_text": "rgb(70, 67, 58)",
      "toolbar_field": "rgb(211, 207, 178)",
      "toolbar_field_text": "rgb(70, 67, 58)",
      "tab_line": "rgb(70, 67, 58)",
      "popup": "rgb(70, 67, 58)",
      "popup_text": "rgb(211, 207, 178)",
      "tab_loading": "rgb(70, 67, 58)"
    }
  }
}