diff --git a/packages/css-theme/src/components/_topicstoc.scss b/packages/css-theme/src/components/_topicstoc.scss
index 40e7b4ee5c3..c911c668e56 100644
--- a/packages/css-theme/src/components/_topicstoc.scss
+++ b/packages/css-theme/src/components/_topicstoc.scss
@@ -67,7 +67,7 @@ ul.topic-links a.active {
 }
 
 .theme-wrapper.dark ul.topics > li.active a.topic {
-    border-color: 4px solid $fc-text-dark;
+    border-color: $fc-text-dark;
 }
 ul.opics > li > ul.topics.l1 {
   font-weight: normal;
diff --git a/packages/css-theme/src/layout/_section-aside.scss b/packages/css-theme/src/layout/_section-aside.scss
index 2474e02b1df..1e2809e8a76 100644
--- a/packages/css-theme/src/layout/_section-aside.scss
+++ b/packages/css-theme/src/layout/_section-aside.scss
@@ -10,8 +10,6 @@ div.fs-sa {
     max-width: 600px;
     min-width: 250px;
     width: 50%;
-    background: $oc-gray-1;
-    border-left: 1px solid $oc-gray-3;
   }
   aside div.sticky {
     position: sticky;
@@ -26,9 +24,5 @@ div.fs-sa {
     > section {
       background: $oc-gray-9;
     }
-    aside {
-      background: $oc-gray-8;
-      border-color: $oc-gray-7;
-    }
   }
 }