What does my css need to look like in order to change the color of the nav links to white?

Here is my code

```
      <div class="col-sm-12">
    <nav class="navbar navbar-inverse">
 <div class="container-fluid">
<div class="navbar-header">
  <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>                        
  </button>
  <a class="navbar-brand" href="index.html">Tile Works</a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
  <ul class="nav navbar-nav">
    <li><a href="services.html">Services</a></li>
    <li><a href="gallery.html">Photo Gallery</a></li>
    <li><a href="about.html">About Us</a></li>
    <li><a href="contact.html">Contact Us</a></li>
  </ul>
</div>
</div>
</nav>
</div>

```