Edit in JSFiddle

<nav>
	<a href="#">Home</a><a href="#">About Us</a><a href="#">Products</a>
</nav>

nav {
    background: url(http://thenewcode.com/assets/images/clouds.jpg) no-repeat;
    margin: 0;
    width: 100%;
    background-color: #ccf;
    margin-bottom: 4rem;
}
nav a {
    text-decoration: none;
    color: #fff;
    padding: 1.5rem;
    text-shadow: 2px 2px 1px rgba(0, 0, 0, 0.7);
    transition: background 1s;
    font-size: 1.2rem;
    display: inline-block;
}
nav a:hover {
    background: rgba(0, 0, 0, 0.7);
}