textual/docs/styles/background.md

Background

The background rule sets the background color of a widget with an optional transparency level.

Syntax

background: <COLOR> [<PERCENTAGE>];

--8<-- "docs/styles/snippets/color_css_syntax.md"

Examples

This example creates three widgets and applies a different background to each.

=== "background.py"

```python
--8<-- "docs/examples/styles/background.py"
```

=== "background.css"

```sass
--8<-- "docs/examples/styles/background.css"
```

=== "Output"

```{.textual path="docs/examples/styles/background.py"}
```

The next example creates ten widgets layed out side by side to show the effect of setting different percentages for the transparency of the background color.

=== "background_transparency.py"

```python
--8<-- "docs/examples/styles/background_transparency.py"
```

=== "background_transparency.css"

```sass
--8<-- "docs/examples/styles/background_transparency.css"
```

=== "Output"

```{.textual path="docs/examples/styles/background_transparency.py"}
```

CSS

/* Blue background */
background: blue;

/* 20% red background */
background: red 20%;

/* RGB color */
background: rgb(100,120,200);

/* HSL color */
background: hsl(290,70%,80%);

Python

You can use the same syntax as CSS, or explicitly set a Color object for finer-grained control.

# Set blue background
widget.styles.background = "blue"
# Set through HSL model
widget.styles.background = "hsl(351,32%,89%)"

from textual.color import Color
# Set with a color object by parsing a string
widget.styles.background = Color.parse("pink")
widget.styles.background = Color.parse("#FF00FF")
# Set with a color object instantiated directly
widget.styles.background = Color(120, 60, 100)