diff --git a/a.html b/a.html
index 4e40f74..e884d79 100644
--- a/a.html
+++ b/a.html
@@ -20,6 +20,9 @@
         #purple{
             background-color: purple;
         }
+        #teal{
+            background-color: teal;
+        }
         button {
             border-radius: 5px;
             width: 60px;
@@ -35,6 +38,7 @@
     <button id="blue"onclick=setColor('blue')>blue</button>
     <button id="white"onclick=setColor('white')>white</button>
     <button id="purple"onclick=setColor('purple')>purple</button>
+    <button id="teal"onclick=setColor('teal')>teal</button>
     <button onclick=randomColor()>random</button>
 </body>
 </html>
\ No newline at end of file