title: Invalid <color> for given resource value
body: <p>I always get the following error when building:</p>
  <pre><code>Invalid &lt;color&gt; for given resource value.
  Failed to compile values file.
  </code></pre>
  <p>My colors.xml:</p>
  <pre class="lang-xml prettyprint-override"><code>&lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
  &lt;resources&gt;
      &lt;color name=&quot;Eins&quot;&gt;#ffd700&lt;/color&gt;
      &lt;color name=&quot;Zwei&quot;&gt;#000088&lt;/color&gt;
      &lt;color name=&quot;Drei&quot;&gt;#fe0000&lt;/color&gt;
      &lt;color name=&quot;Vier&quot;&gt;#8800ff&lt;/color&gt;
      &lt;color name=&quot;Funf&quot;&gt;#008800&lt;/color&gt;
      &lt;color name=&quot;Sechs&quot;&gt;#ff00ff&lt;/color&gt;
      &lt;color name=&quot;Sieben&quot;&gt;#00ff00&lt;/color&gt;
      &lt;color name=&quot;Acht&quot;&gt;#0088ff&lt;/color&gt;
  &lt;/resources&gt;
  </code></pre>
  <p>I always called it with</p>
  <pre><code>resources.getColor(R.color.Sieben)
  </code></pre>
  <p>It worked the whole time, I didn't change anything, but suddenly it doesn't work anymore</p>
  <p>I have copied the contents of the file several times into new files, the error is always in the same place</p>