diff --git a/how-to-make-a-notebook-that/main.css b/how-to-make-a-notebook-that/main.css
index 9d49c73..0ea0484 100644
--- a/how-to-make-a-notebook-that/main.css
+++ b/how-to-make-a-notebook-that/main.css
@@ -43,24 +43,24 @@ a{
 	color:black;
 	text-decoration:none;
 	background:transparent;
-	border-bottom:1.5px solid #99f;
+	border-bottom:1.5px solid #a6dbf0;
 	padding-top:.05rem;
 	padding-bottom:.05rem;
-	background:linear-gradient(to bottom, #99f 0, #99f 100%);
+	background:linear-gradient(to bottom, #a6dbf0 0, #a6dbf0 100%);
 	background-position:0 100%;
 	background-repeat:repeat-x;
 	background-size: 0 0;
 	transition:background .2s ease-in-out;
 }
 
-.ext {
-	border-bottom-color: #99f;
-	background:linear-gradient(to bottom, #99f 0, #99f 100%);
-	background-position:0 100%;
-	background-repeat:repeat-x;
-	background-size: 0 0;
-	transition:background .2s ease-in-out;
-}
+ext {
+    border-bottom-color: #a6dbf0;
+    background: linear-gradient(to bottom, #a6dbf0 100%, #a6dbf0 100%);
+    background-position: 0 100%;
+    background-repeat: repeat-x;
+    background-size: 0 0;
+    transition: background .2s ease-in-out;
+	}
 
 .int {
 	border-bottom-color:#c6f;