title: Understanding colors on Android (six characters)
body: <p>I am trying to understand how colors work in Android. I have this color set as the background of my <code>LinearLayout</code>, and I get a background gray with some transparency:</p>
  
  <pre><code>&lt;gradient android:startColor="#b4555555" android:endColor="#b4555555"
   android:angle="270.0" /&gt;
  </code></pre>
  
  <p>If I remove the last two characters (55) I get a solid color, losing the transparency. I was trying to find a page where I can see some explanation about this, but I couldn't find it. </p>