diff --git a/guide-en/intro.html b/guide-en/intro.html
index c5f02a647..0fc4d78c9 100644
--- a/guide-en/intro.html
+++ b/guide-en/intro.html
@@ -28,7 +28,7 @@
 
   <link rel="stylesheet" href="./../assets/css/gstyle.css">
   <link rel="icon" href="./../assets/images/icon.png">
-  <meta name="theme-color" content="#3eaf7c">
+  <meta name="theme-color" content="#fff">
   <meta name="twitter:card" content="summary">
 
   <meta property="og:title" content="sern Guide">
@@ -322,4 +322,4 @@
   </body>
 </html>
 </body>
-</html>
\ No newline at end of file
+</html>