diff --git a/how-to-make-a-notebook-that/main.css b/how-to-make-a-notebook-that/main.css
index 0ea0484..69b4643 100644
--- a/how-to-make-a-notebook-that/main.css
+++ b/how-to-make-a-notebook-that/main.css
@@ -570,7 +570,7 @@ p.subcl3{
 @media all and (min-width: 992px) and (max-width: 1400px) {
 
 a{
-	border-bottom:2px solid  #99f;
+	border-bottom:2px solid  #a6dbf0;
 }
 
 /*header*/