How to make active menu item with highlight style?

.main-menu ul {
  padding: 0px;
  margin: 0px;
  text-align: center;
}

.main-menu li {
  list-style: none;
  display: inline-block;
  padding: 40px 0;
}

.main-menu a {
  font-family: 'Open Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  margin-right: 5px;
  padding: 5px 5px;
  margin: 0;
  border-radius: 3px;
  /*color: #fff;*/
  line-height: 24px;
  display: inline-block;
}

.main-menu a:hover {
  background-color: #F78E21;
  color: #fff;
}

<div class="main-menu"><ul><li><a class="active" href="index.html">Home</a></li><li><a href="about-us.html">About Us</a></li><li><a href="products.html">Projects</a></li><li><a href="contact-us.html">Gallery</a></li><li><a href="contact-us.html">TV Appearances</a></li><li><a href="contact-us.html">Events</a></li><li><a href="contact-us.html">Links</a></li><li><a href="contact-us.html">Testimonials</a></li><li><a href="contact-us.html">Contact Us</a></li></ul></div>