diff --git a/html_resources/style.css b/html_resources/style.css
index bff7c01..82b30b8 100644
--- a/html_resources/style.css
+++ b/html_resources/style.css
@@ -211,12 +211,20 @@ span.chapter::before {
   font-size: 0.75em;
   position: relative;
   bottom: 0.15em;
+  color: #090944;
+}
+a:visited>span.chapter::before {
+  color: #0f320c;
 }
 span.chapter::after {
   content: "\25c3";
   font-size: 0.75em;
   position: relative;
   bottom: 0.15em;
+  color: #090944;
+}
+a:visited>span.chapter::after {
+  color: #0f320c;
 }
 
 span.blur {