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---
title: safe.CSS
description: Declares the given string as a safe CSS string.
categories: []
keywords: []
action:
aliases: [safeCSS]
related:
- functions/safe/HTML
- functions/safe/HTMLAttr
- functions/safe/JS
- functions/safe/JSStr
- functions/safe/URL
returnType: template.CSS
signatures: [safe.CSS INPUT]
toc: true
aliases: [/functions/safecss]
---
## Introduction
{{% include "functions/_common/go-html-template-package.md" %}}
## Usage
Use the `safe.CSS` function to encapsulate known safe content that matches any of:
1. The CSS3 stylesheet production, such as `p { color: purple }`.
2. The CSS3 rule production, such as `a[href=~"https:"].foo#bar`.
3. CSS3 declaration productions, such as `color: red; margin: 2px`.
4. The CSS3 value production, such as `rgba(0, 0, 255, 127)`.
Use of this type presents a security risk: the encapsulated content should come from a trusted source, as it will be included verbatim in the template output.
See the [Go documentation] for details.
[Go documentation]: https://pkg.go.dev/html/template#CSS
## Example
Without a safe declaration:
```go-html-template
{{ $style := "color: red;" }}
<p style="{{ $style }}">foo</p>
```
Hugo renders the above to:
```html
<p style="ZgotmplZ">foo</p>
```
{{% note %}}
`ZgotmplZ` is a special value that indicates that unsafe content reached a CSS or URL context at runtime.
{{% /note %}}
To declare the string as safe:
```go-html-template
{{ $style := "color: red;" }}
<p style="{{ $style | safeCSS }}">foo</p>
```
Hugo renders the above to:
```html
<p style="color: red;">foo</p>
```
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