diff --git a/stylesheets/styles.css b/stylesheets/styles.css
index 4a2292b..1af1fdd 100644
--- a/stylesheets/styles.css
+++ b/stylesheets/styles.css
@@ -584,12 +584,16 @@ h3 {
 }
 
 a {
-  color: #ffcc00;
+  color: #ffcc00; /* yellow */
+  /*color: #7777ff; blue */
+  /*color: #33ff33; green */
   font-weight: 400;
   text-decoration: none;
 }
 a:hover {
-  color: #ffeb9b;
+  color: #ffeb9b; /* yellow */
+  /*color: #9999ff; blue */
+  /*color: #99ff99; green */
 }
 
 a small {
@@ -687,7 +691,7 @@ td {
 hr {
   border: none;
   height: 1px;
-  background-color: #f0e7d5;
+  background-color: #555;
   margin: 0 0 20px;
 }
 
@@ -852,3 +856,7 @@ section #title .credits.right {
     display: none;
   }
 }
+
+.MathJax_Display {
+    font-size: 18px;
+}