title: Android 5.0 - Intellij Gradle: Cannot resolve symbol: @color:material_blue_500
body: <p>I am trying to customize the material design theme as suggested in this link :
  <a href="http://developer.android.com/training/material/compatibility.html" rel="noreferrer">android dev</a> </p>
  
  <p>but when I add the following code to my v21/styles file Intellij says that it cannot resolve these symbols. </p>
  
  <pre><code>&lt;resources&gt;
  
      &lt;!-- Base application theme. --&gt;
      &lt;style name="AppTheme" parent="Theme.AppCompat.Light"&gt;
          &lt;!-- customize the color palette --&gt;
          &lt;item name="colorPrimary"&gt;@color/material_blue_500&lt;/item&gt;
          &lt;item name="colorPrimaryDark"&gt;@color/material_blue_700&lt;/item&gt;
          &lt;item name="colorAccent"&gt;@color/material_green_A200&lt;/item&gt;
      &lt;/style&gt;
  
  &lt;/resources&gt;
  </code></pre>
  
  <p>I looked around to see if there are any particular settings that need to be done on the color side but nothing came up. I am using API 21 with support lib v7 on gradle. </p>