diff --git a/py-polars/polars/dataframe/frame.py b/py-polars/polars/dataframe/frame.py
index 6c26ed7feb2c..cf23828c420b 100644
--- a/py-polars/polars/dataframe/frame.py
+++ b/py-polars/polars/dataframe/frame.py
@@ -3186,6 +3186,7 @@ def write_excel(
             dtype_formats=dtype_formats,
             header_format=header_format,
             float_precision=float_precision,
+            table_style=table_style,
             row_totals=row_totals,
             sparklines=sparklines,
             formulas=formulas,
diff --git a/py-polars/polars/io/spreadsheet/_write_utils.py b/py-polars/polars/io/spreadsheet/_write_utils.py
index ab97658aa206..6509eaa54390 100644
--- a/py-polars/polars/io/spreadsheet/_write_utils.py
+++ b/py-polars/polars/io/spreadsheet/_write_utils.py
@@ -48,8 +48,6 @@ def _cluster(iterable: Iterable[Any], n: int = 2) -> Iterable[Any]:
     Date: "yyyy-mm-dd;@",
     Time: "hh:mm:ss;@",
 }
-for tp in INTEGER_DTYPES:
-    _XL_DEFAULT_DTYPE_FORMATS_[tp] = _XL_DEFAULT_INTEGER_FORMAT_
 
 
 class _XLFormatCache:
@@ -331,6 +329,7 @@ def _xl_setup_table_columns(
     formulas: dict[str, str | dict[str, str]] | None = None,
     row_totals: RowTotalsDefinition | None = None,
     float_precision: int = 3,
+    table_style: dict[str, Any] | str | None = None,
 ) -> tuple[list[dict[str, Any]], dict[str | tuple[str, ...], str], DataFrame]:
     """Setup and unify all column-related formatting/defaults."""
 
@@ -428,13 +427,19 @@ def _map_str(s: Series) -> Series:
     # seed format cache with default fallback format
     fmt_default = format_cache.get({"valign": "vcenter"})
 
-    # default float format
+    # default float format; account for dark styles
+    if table_style is None or "table style dark" not in str(table_style).lower():
+        int_base_fmt = _XL_DEFAULT_INTEGER_FORMAT_
+        flt_base_fmt = _XL_DEFAULT_FLOAT_FORMAT_
+    else:
+        int_base_fmt = _XL_DEFAULT_INTEGER_FORMAT_.split(";", 1)[0]
+        flt_base_fmt = _XL_DEFAULT_FLOAT_FORMAT_.split(";", 1)[0]
+
+    for tp in INTEGER_DTYPES:
+        _XL_DEFAULT_DTYPE_FORMATS_[tp] = int_base_fmt
+
     zeros = "0" * float_precision
-    fmt_float = (
-        _XL_DEFAULT_INTEGER_FORMAT_
-        if not zeros
-        else _XL_DEFAULT_FLOAT_FORMAT_.replace(".000", f".{zeros}")
-    )
+    fmt_float = int_base_fmt if not zeros else flt_base_fmt.replace(".000", f".{zeros}")
 
     # assign default dtype formats
     for tp, fmt in _XL_DEFAULT_DTYPE_FORMATS_.items():
diff --git a/py-polars/tests/unit/io/test_spreadsheet.py b/py-polars/tests/unit/io/test_spreadsheet.py
index 744c029ae059..d1c3aae42186 100644
--- a/py-polars/tests/unit/io/test_spreadsheet.py
+++ b/py-polars/tests/unit/io/test_spreadsheet.py
@@ -545,7 +545,7 @@ def test_read_excel_all_sheets_with_sheet_name(path_xlsx: Path, engine: str) ->
         # basic formatting
         {
             "autofit": True,
-            "table_style": "Table Style Light 16",
+            "table_style": "Table Style Dark 2",
             "column_totals": True,
             "float_precision": 0,
         },