CodePen

HTML

            
              <h1>OSX-style Disk Usage <xmp>..using html5 <meter></xmp></h1>

<p>
  Macintosh HD <span class="free-space">64.54 GB free out of 120.47 GB</span></p>

<meter value="55.93" min="0" max="120.47" title="GB">
  <div class="meter-gauge">
    <span style="width: 46.42%;">Disk Usage - 55.93GB out of 120GB</span>
  </div>
</meter>  
  
<ul class="swatch">
  <li class="swatch__elem">Audio <span class="used-space">670.5 MB</span></li>
  <li class="swatch__elem">Movies <span class="used-space">10.1 GB</span></li>
  <li class="swatch__elem">Photos <span class="used-space">25.19 GB</span></li>
  <li class="swatch__elem">Apps <span class="used-space">19.31 GB</span></li>
  <li class="swatch__elem">Other <span class="used-space">660.5 MB</span></li>
</ul>
            
          
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↑ Insert the most common viewport meta tag

CSS

            
              @import url(http://fonts.googleapis.com/css?family=Roboto);

body {
  
  font-family: "Roboto", "Lucida Grande", "Lucida", sans-serif;
  margin: 5em auto;
  
  width: 550px;
}

h1 {
  
  font-size: 1.5em;
  margin: 0 auto 2.5em;
  font-weight: 700;
}

xmp {
  
  font-family: Consolas, Monaco, monospace;
  font-size: 85%;
  color: #666;
  font-weight: 400;
}

meter {
  
  display: block;
  margin: 0 auto;
  
  width: 550px;
  height: 25px;
  
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;

  border: 1px solid #ccc;
  border-radius: 3px;
  
  /* Firefox */
  background: none; /* Required to get rid of the default background prop. */
  background-color: whiteSmoke;  
  box-shadow: 0 5px 5px -5px #333 inset;
}

meter::-webkit-meter-bar {
  
  background: none; /* Important to get rid of default background. */
  background-color: whiteSmoke;
  
  box-shadow: 0 5px 5px -5px #333 inset;
}

meter::-webkit-meter-optimum-value {
  
  transition: width .5s;
  box-shadow: 0 5px 5px -5px #999 inset;
  
  background-image: linear-gradient( 90deg, 
                                     #8bcf69 5%, 
                                     #e6d450 5%,
                                     #e6d450 15%,
                                     #f28f68 15%,
                                     #f28f68 55%,
                                     #cf82bf 55%,
                                     #cf82bf 95%,
                                     #719fd1 95%,
                                     #719fd1 100%);
  
  background-size: 100% 100%;
}

meter::-webkit-meter-optimum-value:hover {
  
 
  transition: width .5s;
  width: 100% !important; /* !important keyword used to override the inline style in ebkit browsers. */
}

meter::-moz-meter-bar {
  
  box-shadow: 0 5px 5px -5px #999 inset;
  
  background-image: linear-gradient( 90deg, 
                                     #8bcf69 5%, 
                                     #e6d450 5%,
                                     #e6d450 15%,
                                     #f28f68 15%,
                                     #f28f68 55%,
                                     #cf82bf 55%,
                                     #cf82bf 95%,
                                     #719fd1 95%,
                                     #719fd1 100%);
  
  background-size: 100% 100%;
}

p {
 
  margin: 0 auto ;
  width: 550px;
  line-height: 2.5;
}

.free-space {
  
  float: right;
}

.swatch {
  
  margin: 0; padding:0;
  margin: 5em auto;
  list-style-type: none;
  width: 550px;
  display: block;
  position: relative;
}

.swatch::before {
  
  content: '';
  width: 100%;
  height: 10px;
  outline: 0px solid #000;
  position: absolute;
  top: -20px;
  left: 0;
  border-radius: 2px;
  
  background-image: linear-gradient( 90deg, 
                                     #8bcf69 20%, 
                                     #e6d450 20%,
                                     #e6d450 40%,
                                     #f28f68 40%,
                                     #f28f68 60%,
                                     #cf82bf 60%,
                                     #cf82bf 80%,
                                     #719fd1 80%,
                                     #719fd1 100%);

}

.swatch__elem {
  
  outline: 0px solid #c00;
  float: left;
  width: 110px;
  padding-left: 5px;

  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
}

.used-space {
  
  display: block;
  line-height: 2;
  font-size: 85%;
  color: #666;
}

.meter-gauge {

    border: 1px solid #ccc;
    border-radius: 3px;

    background-color: whiteSmoke;
    box-shadow: 0 5px 5px -5px #333 inset;

    width: 550px;
    height: 25px;
    
    display: block;
}
  
.meter-gauge > span {
 
  height: inherit;  
  box-shadow: 0 5px 5px -5px #999 inset;
  
  background-color: blue;
  background-image: linear-gradient( 90deg, 
                                     #8bcf69 5%, 
                                     #e6d450 5%,
                                     #e6d450 15%,
                                     #f28f68 15%,
                                     #f28f68 55%,
                                     #cf82bf 55%,
                                     #cf82bf 95%,
                                     #719fd1 95%,
                                     #719fd1 100%);
  
  background-size: 100% 100%;

  display: block;
  text-indent: -9999px;
}
            
          
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