JSFiddle - React, Tailwind, and code Playground

HTML

<i class="fa fa-clock-o fa-spin fa-3x "></i>

CSS

@font-face {
  font-family: 'FontAwesome';
  src: url('http://maxcdn.bootstrapcdn.com/font-awesome/4.1.0/fonts/fontawesome-webfont.eot?v=4.1.0');
  src: url('http://maxcdn.bootstrapcdn.com/font-awesome/4.1.0/fonts/fontawesome-webfont.eot?#iefix&v=4.1.0') format('embedded-opentype'), url('../fonts/fontawesome-webfont.woff?v=4.1.0') format('woff'), url('http://maxcdn.bootstrapcdn.com/font-awesome/4.1.0/fonts/fontawesome-webfont.ttf?v=4.1.0') format('truetype'), url('http://maxcdn.bootstrapcdn.com/font-awesome/4.1.0/onts/fontawesome-webfont.svg?v=4.1.0#fontawesomeregular') format('svg');
  font-weight: normal;
  font-style: normal;
}
.fa {
  display: inline-block;
  font-family: FontAwesome;
  font-style: normal;
  font-weight: normal;
  line-height: 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin-right: 10px;
}

.fa-file-o:before {
  content: "\f016";
  color: green;
  font-size: 30px;
}
.fa-clock-o:before {
  content: "\f017";
  color: #333;
  font-size: 50px;
}

.fa-download:before {
  content: "\f019";
  color:orange;
}