silverstripe-framework/docs/en/02_Developer_Guides/01_Templates/06_Themes.md

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title: Themes
summary: What makes up a SilverStripe Theme. How to install one or write your own theme.
# Themes
Themes can be used to kick start your SilverStripe projects, can be stored outside of your application code and your
application can provide multiple unique themes (i.e a mobile theme).
## Downloading
Head to the [ Themes ](http://www.silverstripe.org/themes) area of the website to check out the range of themes the
community has built. Each theme has a page with links you can use to preview and download it. The theme is provided
as a .tar.gz file.
## Installation
### Manually
Unpack the contents of the zip file you download into the `themes` directory in your SilverStripe installation. The
theme should be accessible at `themes/theme_name`.
### Via Composer
If a theme has `composer` support you can require it directly through `composer`.
:::bash
composer require "author/theme_name" "dev/master"
<div class="alert" markdown="1">
As you've added new files to your SilverStripe installation, make sure you clear the SilverStripe cache by appending
`?flush=1` to your website URL (e.g http://yoursite.com/?flush=1).
</div>
After installing the files through either method, update the current theme in SilverStripe. This can be done by
either altering the `SSViewer.theme` setting in a [config.yml](../configuration) or by changing the current theme in
the Site Configuration panel (http://yoursite.com/admin/settings)
**mysite/_config/app.yml**
:::yml
SSViewer:
theme: theme_name
## Developing your own theme
A `theme` within SilverStripe is simply a collection of templates and other front end assets such as javascript and css.
located within the `themes` directory.
![themes:basicfiles.gif](../../_images/basicfiles.gif)
Your theme can also be organised into split folders for each module it caters for.
```
themes
blackcandy
css
style.css
images
templates
Page.ss
Layout
Page.ss
Includes
blackcandy_blog
css
blog.css
images
templates
Layout
BlogHolder.ss
BlogEntry.ss
Includes
```
## Submitting your theme to SilverStripe
If you want to submit your theme to the SilverStripe directory then check
* You should ensure your templates are well structured, modular and commented so it's easy for other people to customize
* Templates should not contain text inside images and all images provided must be open source and not break any
copyright or license laws. This includes any icons your template uses.
* A theme does not include any PHP files. Only CSS, HTML, Images and javascript.
Your theme file must be in a .tar.gz format. A useful tool for this is - [7 Zip](http://www.7-zip.org/). Using 7Zip you
must select the your_theme folder and Add to archive, select TAR and create. Then after you have the TAR file right
click it -> Add to Archive (again) -> Then use the archive format GZIP.
## Links
* [Themes Listing on silverstripe.org](http://silverstripe.org/themes)
* [Themes Forum on silverstripe.org](http://www.silverstripe.org/themes-2/)
* [Themes repository on github.com](http://github.com/silverstripe-themes)