Rails 3 - Building a Table, Want to Alternate colors every row

Desired Output:

<ul>
 <li class="odd">stuff</li>
 <li class="even">stuff</li>
 <li class="odd">stuff</li>
 <li class="even">stuff</li>
 <li class="odd">stuff</li>
 <li class="even">stuff</li>
 <li class="odd">stuff</li>
 <li class="even">stuff</li>
</ul>

CSS:

.odd {color:blue}
.even{color:red;}

In rails 3 is there a clean way to do this without counters etc?

thanks