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# <keyline>
The `<keyline>` CSS type represents a line style used in the [keyline](../styles/keyline.md) rule.
## Syntax
| Value | Description |
| -------- | -------------------------- |
| `none` | No line (disable keyline). |
| `thin` | A thin line. |
| `heavy` | A heavy (thicker) line. |
| `double` | A double line. |
## Examples
### CSS
```css
Vertical {
keyline: thin green;
}
```
### Python
```py
# A tuple of <keyline> and color
widget.styles.keyline = ("thin", "green")
```
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