You need to get rid of the "navbar-inverse" class. Here is a fiddle: http://www.bootply.com/124086
<div id="navbar" class="navbar navbar-fixed-top">
<nav>
<ul class="nav nav-stacked" id="menu-bar">
<li><img src="#"></li>
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact</a></li>
</ul>
</nav>
</div>