diff --git a/whiteboard/examples/basic/newIndex.html b/whiteboard/examples/basic/newIndex.html
index 16507e7..7cf02e1 100644
--- a/whiteboard/examples/basic/newIndex.html
+++ b/whiteboard/examples/basic/newIndex.html
@@ -75,9 +75,10 @@ <h2>Collaborators: <span id="occupancy">0</span></h2>
             </a>
             <ul>
               <li><a class="btn-floating btn-small red" onclick="changer('#f44336')"></a></li>
-              <li><a class="btn-floating btn-small yellow" onclick="changer('#ffeb3b')"></a></li>
+              <li><a class="btn-floating btn-small purple" onclick="changer('#800080')"></a></li>
               <li><a class="btn-floating btn-small green"  onclick="changer('#4caf50')"></a></li>
               <li><a class="btn-floating btn-small blue" onclick="changer('#2196f3')"></a></li>
+               <li><a class="btn-floating btn-small black" onclick="changer('#000000')"></a></li>
               <li><a class="btn-floating btn-small orange" id="link" onclick="save()"></a></li>
               <li><a class="btn-floating btn-small black" id="link" onclick="changer('erase')"></a></li>
             </ul>
@@ -118,4 +119,4 @@ <h2>Collaborators: <span id="occupancy">0</span></h2>
     <script type="text/javascript" src="./app.js"></script>
 </body>
 
-</html>
\ No newline at end of file
+</html>