diff --git a/public/index.html b/public/index.html
index abb06a13769b4a50c4934d5328c33cdd3a50cdd2..3635d9ee6e7017d7e62c5501791750af5712e00b 100644
--- a/public/index.html
+++ b/public/index.html
@@ -7,7 +7,7 @@
     <style>
       /* Style for the buttons */
       button {
-        background-color: 05CAFF;
+        background-color: #05CAFF;
         color: white;
         font-size: 24px;
         padding: 12px 24px;