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# Custom CSS

Allows you to set a custom CSS on the Block page. The function directs to an URL with the CSS file.

Default: empty

**Example:**

**`v8.0.0 and up`**

```javascript title="v8.0.0 and up"
table px_configs {
  px_css_ref: 'https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css',
}
```

**`v7.2.0 and below`**

```javascript title="v7.2.0 and below"
table px_configs {
  CSS_REF: 'https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css',
}
```