title: How to change the bootstrap's well color?
body: <p>I just started learning php and I dont know how to change the color of well.
  Doing research I found this</p>
  
  <pre><code>.well.homefull{
  
  background: rgba(0, 0, 0, 0.4);
  
  }
  </code></pre>
  
  <p>But I dont know where to put it and how to use it with </p>
  
  <pre><code>&lt;div class="well"&gt;
  </code></pre>
  
  <p>if I simply put it before div class=well it doesnt work</p>