## Stroke.back_tint_and_shade property

Gets or sets a double value that lightens or darkens the stroke background color.


```python
@property
def back_tint_and_shade(self) -> float:
    ...

@back_tint_and_shade.setter
def back_tint_and_shade(self, value: float):
    ...

```

### Remarks

The allowed values are within the range from -1 (the darkest) to 1 (the lightest) for this property.
Zero (0) is neutral. Attempting to set this property to a value less than -1 or more than 1
results in System.ArgumentOutOfRangeException.




### Examples

Shows how to set back theme color and tint and shade.

```python
doc = aw.Document(file_name=MY_DIR + 'Stroke gradient outline.docx')
shape = doc.get_child(aw.NodeType.SHAPE, 0, True).as_shape()
stroke = shape.stroke
stroke.back_theme_color = aw.themes.ThemeColor.DARK2
stroke.back_tint_and_shade = 0.2
doc.save(file_name=ARTIFACTS_DIR + 'Shape.StrokeBackThemeColors.docx')
```

### See Also

* module [aspose.words.drawing](../../)
* class [Stroke](../)