Examine source code of Microsoft Edge - Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Microsoft Edge - Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(59, 59, 59)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(27, 27, 27)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(43, 43, 43)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(59, 59, 59, 0)",
      "popup": "rgb(74, 74, 74)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(45, 45, 45)",
      "ntp_text": "rgb(239, 239, 239)",
      "sidebar_border": "rgb(59, 59, 59)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(51, 51, 51)",
      "tab_loading": "rgb(90, 171, 227)",
      "toolbar_bottom_separator": "rgb(91, 91, 91)",
      "toolbar_field_border_focus": "rgb(99, 173, 229)",
      "toolbar_field_border": "rgba(59, 59, 59, 0)",
      "toolbar_field_focus": "rgb(43, 43, 43)",
      "toolbar_field_highlight_text": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(147, 184, 231)",
      "toolbar_top_separator": "rgba(255, 255, 255, 0)"
    }
  }
}