Examine source code of Night Beige

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Night Beige",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(76, 79, 89)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(49, 55, 83)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgb(54, 58, 89)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(199, 153, 96)",
      "popup": "rgb(225, 225, 225)",
      "popup_text": "rgb(0, 0, 0)",
      "icons_attention": "rgb(0, 0, 0)",
      "icons": "rgb(189, 201, 215)",
      "popup_highlight_text": "rgb(51, 57, 98)",
      "popup_highlight": "rgb(47, 57, 127)",
      "tab_loading": "rgb(199, 153, 96)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{44d21f58-a254-428a-8435-1490aaf98b21}"
    }
  }
}