Examine source code of Windows 11

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Windows 11",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0.43)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgba(255, 255, 255, 0.61)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(222, 232, 244)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(63, 127, 201)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(102, 181, 229)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgb(102, 181, 229)",
      "tab_loading": "rgb(102, 181, 229)"
    }
  }
}