In the config.xml there are some configuration variables

<!--
Name of the Application
this is the Top-Icon Name of the Application
-->
<currentappname>OpenMeetings 1.9.x r4343</currentappname>
<!--
URL to the Home of the Application
this is the URL which is used if you click on the Top-icon
-->
<currentappnameurl>http://incubator.apache.org/openmeetings/</currentappnameurl>
<!--
URL to Bugs/Support
this is the URL which is used if you click on *report a bug*
-->
<currentappnamebugurl>http://incubator.apache.org/openmeetings/</currentappnamebugurl>

Addtionally the browser-bar title can be configured in the Openmeetings > Administration > Configuration.

Config Key: application.name

With Version 2.x color and more layout specific configuration moved to the theme configuration, see themes-and-branding.html

To change the color scheme you can simply edit the config.xml, there are 3 color settings, the whole application is styled using those:

<!--
These colors are the main colors and style the whole application
-->
<basebgcolorizer>0x669AE6</basebgcolorizer>
<baseMousecolorizer>0x7BA8EA</baseMousecolorizer>
<baseMouseOvercolorizer>0x99BBEE</baseMouseOvercolorizer>