Dijit Themes lend a consistent look and feel to widgets. We've been using the Tundra theme until this point, but Dijit comes bundled with others as well.
Tundra
Soria
Noir
In this section, we'll review some theme features and learn how to override them for those occasional little tweaks. But you're not limited to the bundled themes - you can write your own as well, and we've devoted a page to that.

Cross-browser css in Dojo
See also http://www.dojotoolkit.org/book/dojo-porting-guide-0-4-x-0-9/style-html-...