diff --git a/theme-github-auto.css b/theme-github-auto.css
index 49d12a2..d3006ac 100644
--- a/theme-github-auto.css
+++ b/theme-github-auto.css
@@ -748,7 +748,7 @@
   .code-diff-split .del-code .add-code.lines-num-new,
   .code-diff-split .del-code .add-code.lines-type-marker-new,
   .code-diff-split .del-code .add-code.lines-code-new {
-    background: #224035;
+    background: rgba(70,149,74,0.15);
   }
 
   .tag-code,
@@ -903,7 +903,7 @@
   .code-diff-split .del-code .lines-num-old,
   .code-diff-split .del-code .lines-type-marker-old,
   .code-diff-split .del-code .lines-code-old {
-    background: #7a341e;
+    background: rgba(229,83,75,0.15);
   }
 
   /* diff color neutral */
@@ -1399,4 +1399,7 @@
   .repository.view.issue .comment-list .comment > .content > div:first-child {
     border-bottom: 1px solid #373e47 !important;
   }
+  .tag-code, .tag-code td, .tag-code .blob-excerpt {
+    background-color: var(--color-body);
+  }
 }
diff --git a/theme-github-dark.css b/theme-github-dark.css
index 2cae860..278c917 100755
--- a/theme-github-dark.css
+++ b/theme-github-dark.css
@@ -978,3 +978,7 @@ footer {
 .repository.view.issue .comment-list .comment > .content > div:first-child {
   border-bottom: 1px solid #373e47 !important;
 }
+
+.tag-code, .tag-code td, .tag-code .blob-excerpt {
+  background-color: var(--color-body);
+}