Now no need to edit the code files of CSS to change the colors of navigation. We have given complete control of the Navigation colors in the power full theme panel where you can change the navigation colors of your choice. You can change the navigation hover colors , drop down and there hover colors from here. This can be managed at the Theme panel > General Settings > Navigation.
Now more than that you can have the sticky navigation of the site which option is available here. With in just one click you can turn On/Off the stick navigation of your site.