I am developing the website in wordpress and i wants to change the active state in main menu of my website.But i am stuck : i am using HTML5 Blank custom post. 
Below is the wordpress code for menu. wp_nav_menu(array('theme_location'=>'primary','container_class'=>'Top Nav' ,'container_id'=> 'bs-example-navbar-collapse-1','menu_class'=> 'nav navbar-nav text-uppercase nav-menu'))
i am not getting where to add css properties to make changes in menu.
I just simply wants to change active state of menu links. like when someone visit about us page.The about us link text remains white. 
