Examine source code of Dark Flat (monochrome)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Flat (monochrome)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 23, 23)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(6, 6, 6)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(71, 71, 71, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(255, 255, 255, 0.5)",
      "popup": "rgb(23, 23, 23)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(23, 23, 23)",
      "popup_highlight": "rgb(29, 29, 29)",
      "toolbar_field_border_focus": "rgba(255, 255, 255, 0.5)",
      "toolbar_field_focus": "rgba(19, 19, 19, 0.35)",
      "toolbar_field_highlight": "rgb(59, 59, 59)",
      "toolbar_top_separator": "rgb(50, 50, 50)",
      "tab_loading": "rgba(255, 255, 255, 0.5)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{98a98aed-2a4b-4852-b0c8-1be9bee26408}"
    }
  }
}