So it looks like this question has been asked a few times in the forum, like the following.

http://es.infragistics.com/community/forums/p/12445/53256.aspx

http://es.infragistics.com/community/forums/p/24506/90583.aspx#90583

This is also a Blog about Resource Washing.

http://es.infragistics.com/community/blogs/kiril_matev/archive/2010/08/30/theming-your-infragistics-wpf-line-of-business-applications-made-quick-and-easy.aspx

As for the code posted in 2008 I am unsure how to apply it. The post from 2009 looks promising but I did not see any code attached and I was unsure how to use the Style suggestions.

Based on the Blog post about Resource Washing that sounds like a better solution but I could not get the XAML posted to compile and the attached code ZIP file is no longer valid. I would be very interested to know how to apply a "dark theme" to my project. I would like to apply a specific dark color so the Resource Washing sounds like a better solution.

Could someone post a sample project using the Resource Washer to apply a specific dark color (#FF444444) to the Ribbon, DockManager and ContentPane controls?

Thanks,

   -eric