<p>I'm implementing charts using <a href="http://www.ziya.liquidrail.com/" rel="nofollow noreferrer">The Ziya Charts Gem</a>. Unfortunately, the documentation isn't really helpful or I haven't had enough coffee to figure out theming. I know I can set a theme using</p>

<pre><code>chart.add(:theme, 'whatever')
</code></pre>

<p>Problem: I haven't found any predefined themes, nor have I found a reference to the required format. </p>

To partly answer my own question, there are some themes in the website sources which can be checked out at
```
```
svn co svn://rubyforge.org/var/svn/liquidrail/samples/charting
```
```
(then go to /public/charts/themes/)