vintage_rock07 on "Change Current Link Color"

I'm trying to change the primary menu link color for the current page on http://www.boxmyart.com/about/

I'm using Bootstrap 3.0.3 and WordPress 4.5.3. I've spent a few hours on this reading multiple responses to similar questions. I've tried at least a dozen different ways of getting it to work but so far, no luck.

Here is the CSS I currently have:

.navbar-default .navbar-nav .current-menu-item a,
.navbar-default .navbar-nav .current_page_item a { background-color: #17b6ba !important; color: #fff !important;
}

I've also tried:

.navbar-default .navbar-nav > li > .current-menu-item a,
.navbar-default .navbar-nav > li > .current_page_item a { background-color: #17b6ba !important; color: #fff !important;
}

Any help would be greatly appreciated!