Generated by SassMeister.com.

SassMeister-input-HTML.html

<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">
<ul>
  <li>
    <a class="btn-anm nav-btn nav-btn-dark-blue" href="">
      <i class="fa fa-send">
        
      </i>
      Get In Touch
    </a>
  </li>
</ul>

SassMeister-input.scss

// ----
// Sass (v3.4.7)
// Compass (v1.0.1)
// ----

.fa {
  font:normal normal normal 14px/1 FontAwesome;  
}
i {
  font-style:normal;
}
ul {
  list-style:none;
}
ul>li>a {
  text-transform:uppercase;
  font-family:"Helvetica Neue";
  font-size:14px;
  line-height:1.42857143;
  
}
.nav-btn-dark-blue {
  background-color:#5A7080;
  border:1px solid #5A7080;
  color:white;
  transition:background-color ease 0.5s, color ease 0.5s, border ease 0.5s, box-shadow ease 0.5s;

  &:hover {
    background-color:white;
    color:#5A7080;
    transition:background-color ease 0.5s, color ease 0.5s, border ease 0.5s, box-shadow ease 0.5s;
  }
}
a {
  text-decoration:none;
  text-transformation:uppercase;
}
.nav-btn {
  padding:12px 24px 12px 30px;
  border-radius:2px;
  margin-top:13px;
  margin-right:11px;
  letter-spacing:1px;
}
.nav-btn i {
  position:relative;
  right:12px;
}

SassMeister-output.css

.fa {
  font: normal normal normal 14px/1 FontAwesome;
}

i {
  font-style: normal;
}

ul {
  list-style: none;
}

ul > li > a {
  text-transform: uppercase;
  font-family: "Helvetica Neue";
  font-size: 14px;
  line-height: 1.42857143;
}

.nav-btn-dark-blue {
  background-color: #5A7080;
  border: 1px solid #5A7080;
  color: white;
  transition: background-color ease 0.5s, color ease 0.5s, border ease 0.5s, box-shadow ease 0.5s;
}
.nav-btn-dark-blue:hover {
  background-color: white;
  color: #5A7080;
  transition: background-color ease 0.5s, color ease 0.5s, border ease 0.5s, box-shadow ease 0.5s;
}

a {
  text-decoration: none;
  text-transformation: uppercase;
}

.nav-btn {
  padding: 12px 24px 12px 30px;
  border-radius: 2px;
  margin-top: 13px;
  margin-right: 11px;
  letter-spacing: 1px;
}

.nav-btn i {
  position: relative;
  right: 12px;
}

SassMeister-rendered.html

<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">
<ul>
  <li>
    <a class="btn-anm nav-btn nav-btn-dark-blue" href="">
      <i class="fa fa-send">
        
      </i>
      Get In Touch
    </a>
  </li>
</ul>