This back-end OFBiz theme is bootstrap based and offers 4 colour variants. As an example
The Rainbowstone theme uses the Quicksand font which is licensed under the [SIL OPEN FONT LICENSE Version 1.1](https://svn.apache.org/repos/asf/ofbiz/ofbiz-framework/trunk/themes/rainbowstone/webapp/rainbowstone/fonts/quicksand/Quicksand SIL OFL License 1.1.txt “SIL OPEN FONT LICENSE Version 1.1”)
For more information about this component visit the product page in the OFBiz WIKI, which can be found at https://cwiki.apache.org/confluence/display/OFBIZ/Rainbowstone