Examine source code of Classic blue win10

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "95",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(219, 219, 219)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(47, 95, 149)",
      "tab_background_text": "rgb(217, 217, 217)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(227, 227, 227)",
      "popup": "rgb(218, 218, 218)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(198, 198, 198)",
      "button_background_hover": "rgb(196, 196, 196)",
      "popup_highlight_text": "rgb(19, 19, 19)",
      "popup_highlight": "rgb(223, 223, 223)",
      "toolbar_bottom_separator": "rgb(159, 159, 159)",
      "toolbar_field_border_focus": "rgb(73, 90, 111)",
      "toolbar_field_border": "rgb(181, 181, 181)",
      "toolbar_field_highlight": "rgb(45, 122, 217)",
      "tab_loading": "rgb(227, 227, 227)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b2f8c7dc-188b-4a82-9a46-36b93d8bd692}"
    }
  }
}