---
title: Customizing Hextra
linkTitle: Customization
---

Hextra offers some default customization options in the `hugo.yaml` config file to configure the theme.
This page describes the available options and how to customize the theme further.

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## Custom CSS

To add custom CSS, we need to create a file `assets/css/custom.css` in our site. Hextra will automatically load this file.

### Font Family

The font family of the content can be customized using:

```css {filename="assets/css/custom.css"}
.content {
  font-family: "Times New Roman", Times, serif;
}
```

### Inline Code Element

The color of text mixed with `other text` can customized with:

```css {filename="assets/css/custom.css"}
.content code:not(.code-block code) {
  color: #c97c2e;
}
```

### Primary Color

The primary color of the theme can be customized by setting the `--primary-hue`, `--primary-saturation` and `--primary-lightness` variables:

```css {filename="assets/css/custom.css"}
:root {
  --primary-hue: 100deg;
  --primary-saturation: 90%;
  --primary-lightness: 50%;
}
```

### Component Layout Variables

Hextra provides CSS variables to customize the width of pages, navbar, and footer:

```css {filename="assets/css/custom.css"}
:root {
  /* Page width - also configurable via hugo.yaml params.page.width */
  --hextra-max-page-width: 80rem; /* default: 80rem (normal), 90rem (wide), 100% (full) */

  /* Navbar width - also configurable via hugo.yaml params.navbar.width */
  --hextra-max-navbar-width: 90rem; /* independent navbar width */

  /* Footer width - also configurable via hugo.yaml params.footer.width */
  --hextra-max-footer-width: 80rem; /* independent footer width */
}
```

### Tailwind Theme Variables

Starting with Hextra v0.10.0, which is built on Tailwind CSS v4, you can customize the theme by overriding CSS variables inside the `@layer theme` block.

This lets you customize the global look and feel without having to modify every individual class.

```css {filename="assets/css/custom.css"}
@layer theme {
  :root {
    --hx-default-mono-font-family: "JetBrains Mono", monospace;
  }
}
```

Check out [Tailwind Theme Variables documentation](https://tailwindcss.com/docs/theme#default-theme-variable-reference) for details.

### Further Theme Customization

The theme can be further customized by overriding the default styles via the exposed css classes. An example for customizing the footer element:

```css {filename="assets/css/custom.css"}
.hextra-footer {
  /* Styles will be applied to the footer element */
}

.hextra-footer:is(html[class~="dark"] *) {
  /* Styles will be applied to the footer element in dark mode */
}
```

The following classes can be used to customize various parts of the theme.

#### General

- `hextra-scrollbar` - The scrollbar element
- `content` - Page content container

#### Shortcodes

##### Badge

- `hextra-badge` - The badge element

##### Card

- `hextra-card` - The card element
- `hextra-card-image` - The card image element
- `hextra-card-icon` - The card icon element
- `hextra-card-subtitle` - The card subtitle element

##### Cards

- `hextra-cards` - The cards grid container

##### Jupyter Notebook

- `hextra-jupyter-code-cell` - The Jupyter code cell container
- `hextra-jupyter-code-cell-outputs-container` - The Jupyter code cell outputs container
- `hextra-jupyter-code-cell-outputs` - The Jupyter code cell output div element

##### PDF

- `hextra-pdf` - The PDF container element

##### Steps

- `hextra-steps` - The steps container

##### Tabs

- `hextra-tabs-panel` - The tabs panel container
- `hextra-tabs-toggle` - The tabs toggle button

##### Filetree

- `hextra-filetree` - The filetree container

##### Folder

- `hextra-filetree-folder` - The filetree folder container

#### Navbar

- `hextra-nav-container` - The navbar container
- `hextra-nav-container-blur` - The navbar container in blur element
- `hextra-hamburger-menu` - The hamburger menu button

#### Footer

- `hextra-footer` - The footer element
- `hextra-custom-footer` - The custom footer section container

#### Search

- `hextra-search-wrapper` - The search wrapper container
- `hextra-search-input` - The search input element
- `hextra-search-results` - The search results list container

Optional nested classes used within the search UI:

- `hextra-search-title` - The result title element
- `hextra-search-active` - The active result anchor
- `hextra-search-no-result` - The empty state element
- `hextra-search-prefix` - The breadcrumb/prefix label for grouped results
- `hextra-search-excerpt` - The result snippet text
- `hextra-search-match` - The highlighted query span

#### Table of Contents

- `hextra-toc` - The table of contents container

#### Sidebar

- `hextra-sidebar-container` - The sidebar container
- `hextra-sidebar-active-item` - The active item in the sidebar

#### Language Switcher

- `hextra-language-switcher` - The language switcher button
- `hextra-language-options` - The language options container

#### Theme Toggle

- `hextra-theme-toggle` - The theme toggle button

#### Code Copy Button

- `hextra-code-copy-btn-container` - The code copy button container
- `hextra-code-copy-btn` - The code copy button
- `hextra-copy-icon` - The copy icon element
- `hextra-success-icon` - The success icon element

#### Code Block

- `hextra-code-block` - The code block container
- `hextra-code-filename` - The filename element for code blocks

#### Feature Card

- `hextra-feature-card` - The feature card link element

#### Feature Grid

- `hextra-feature-grid` - The feature grid container

### Syntax Highlighting

List of available syntax highlighting themes are available at [Chroma Styles Gallery](https://xyproto.github.io/splash/docs/all.html). The stylesheet can be generated using the command:

```shell
hugo gen chromastyles --style=github
```

To override the default syntax highlighting theme, we can add the generated styles to the custom CSS file.

## Custom Scripts

You may add custom scripts to the end of the head for every page by adding the following file:

```
layouts/partials/custom/head-end.html
```

## Custom Extra Section in Footer

You can add extra section in the footer by creating a file `layouts/partials/custom/footer.html` in your site.

```html {filename="layouts/partials/custom/footer.html"}
<!-- Your footer element here -->
```

The added section will be added before the copyright section in the footer.
You can use [HTML](https://developer.mozilla.org/en-US/docs/Web/HTML) and [Hugo template syntax](https://gohugo.io/templates/) to add your own content.

Hugo variables available in the footer section are: `.switchesVisible` and `.displayCopyright`.

## Custom Layouts

The layouts of the theme can be overridden by creating a file with the same name in the `layouts` directory of your site.
For example, to override the `single.html` layout for docs, create a file `layouts/docs/single.html` in your site.

For further information, refer to the [Hugo Templates][hugo-template-docs].

## Further Customization

Didn't find what you were looking for? Feel free to [open a discussion](https://github.com/imfing/hextra/discussions) or make a contribution to the theme!

[hugo-template-docs]: https://gohugo.io/templates/