Examine source code of Claude Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Claude Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 30, 27)",
      "toolbar_text": "rgb(194, 192, 182)",
      "frame": "rgb(24, 23, 21)",
      "tab_background_text": "rgb(156, 154, 146)",
      "toolbar_field": "rgb(37, 35, 32)",
      "toolbar_field_text": "rgb(250, 249, 245)",
      "tab_line": "rgb(217, 119, 87)",
      "popup": "rgb(37, 35, 32)",
      "popup_text": "rgb(250, 249, 245)",
      "button_background_active": "rgb(48, 48, 46)",
      "button_background_hover": "rgb(48, 48, 46)",
      "frame_inactive": "rgb(37, 35, 32)",
      "icons_attention": "rgb(217, 119, 87)",
      "icons": "rgb(194, 192, 182)",
      "ntp_background": "rgb(24, 23, 21)",
      "ntp_text": "rgb(250, 249, 245)",
      "popup_border": "rgb(61, 61, 58)",
      "popup_highlight_text": "rgb(250, 249, 245)",
      "popup_highlight": "rgb(48, 48, 46)",
      "sidebar_border": "rgb(61, 61, 58)",
      "sidebar_highlight_text": "rgb(250, 249, 245)",
      "sidebar_highlight": "rgb(48, 48, 46)",
      "sidebar_text": "rgb(194, 192, 182)",
      "sidebar": "rgb(24, 23, 21)",
      "tab_loading": "rgb(217, 119, 87)",
      "tab_selected": "rgb(37, 35, 32)",
      "tab_text": "rgb(250, 249, 245)",
      "toolbar_bottom_separator": "rgb(61, 61, 58)",
      "toolbar_field_border_focus": "rgb(217, 119, 87)",
      "toolbar_field_border": "rgb(61, 61, 58)",
      "toolbar_field_focus": "rgb(37, 35, 32)",
      "toolbar_field_highlight_text": "rgb(250, 249, 245)",
      "toolbar_field_highlight": "rgb(217, 119, 87)",
      "toolbar_field_text_focus": "rgb(250, 249, 245)",
      "toolbar_top_separator": "rgb(61, 61, 58)",
      "toolbar_vertical_separator": "rgb(61, 61, 58)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1de34332-788a-4da8-a06e-a2fc2ee6b2e5}"
    }
  }
}