title: Want to display a box where I set the color, but a span with no content doesn't render?
body: <p>I have a span tag where I set a class to this:</p>
  
  <pre><code>.some-box {
    width: 16px;
      height: 16px;
  }
  
  
  &lt;td&gt;
  &lt;span class="some-box" style="background-color:#333333;"&gt;&lt;/span&gt;
  &lt;/td&gt;
  </code></pre>
  
  <p>It is just an empty box with a color, but it doesn't render anything currently.</p>
  
  <p>How can I fix this?</p>
  
  <p>I tried putting img tag inside with a transparent gif but that didn't work either.</p>