As mentioned previously MDT is fully customizable.
|Navigation Bar Before|
Use the MDT CSS file, Wizard.css, and manage the 3 below CSS classes.
- NavHistory (Green) = Panel which have already been configured
- NavItemHighlighted (Blue) = Panel which is currently displayed
- NavItem (Orange) = Panel which haven't been yet displayed
|Navigation Bar After|
If you want to change the background color of the navigation area, you can use the class : NavigationArea.