Update index.html

index.html

@@ -19,13 +19,13 @@
             display: inline-block;
             margin: 10px;
             padding: 10px 20px;
-            background-color: #90EE90;
+            background-color: #00B4F4;
             color: #000;
             text-decoration: none;
             border-radius: 5px;
         }
         .btn:hover {
-            background-color: #1FBE88
+            background-color: #008CBA
 ;
         }
     </style>