title: Using react-native-maps to Change pinColor of MapView.Marker
body: <p>The color of <code>MapView.Marker</code> does not seem to change from the default red color even after assigning a color to <code>pinColor</code>.</p>
  
  <p>Is something wrong?</p>
  
  <pre><code>{ this.state.markers.map(marker =&gt; {
      return (
          &lt;MapView.Marker 
              coordinate={{latitude: marker.latitude, longitude: marker.longitude}}
              key={marker.key}
              pinColor='#000000'
          /&gt;
      )
  })}
  </code></pre>
  
  <p><strong>Screen cap from Android Emulator</strong></p>
  
  <p><a href="https://i.stack.imgur.com/R0CAD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/R0CAD.png" alt="enter image description here"></a></p>