Let's try a different template on for size. In this example, we'll choose the Beez 3 template:
Navigate to Extensions | Template Manager.
Click the star in the Default column of the Beez3 - Default template. This turns Beez3 into the default template. Click on View Site to see the results:
The default site name Joomla! Open Source Content Management is displayed in the header. Let's fix this now.
Click the template name in the Template Manager: Styles page. In Template Manager: Edit Style screen, click the Options tab to change the Advanced Options as desired. Select the CORBA logo image file you've used previously and enter the appropriate Site Title (in our example CORBA) and Description (Collectors Of Really Bad Art).
As the template's color, select Turquoise. This will affect the header graphic and replace it with a smooth gradient color. Save changes and take a look at the output on the frontend: