fixed bad theeme name

app/index.html

@@ -78,7 +78,7 @@
 
     <div layout="row"  flex>
         <ng-include src="'views/sidebar.html'"></ng-include>
-        <div layout="column" flex md-theme="blue" id="content">
+        <div layout="column" flex id="content">
             <md-content>
                 <ng-include src="'views/toolbar.html'"></ng-include>
                 <md-content layout="column" flex class="md-main-content">