diff --git a/resources/web/guide/1/1.css b/resources/web/guide/1/1.css
index 25095750ce..2529f47934 100644
--- a/resources/web/guide/1/1.css
+++ b/resources/web/guide/1/1.css
@@ -19,7 +19,7 @@ body
 	height:20mm;
 	line-height: 20mm;
 	font-size: 6mm;
-	color: 009688;
+	color: #009688;
 }
 
 #STip