diff --git a/static/css/blog/post.css b/static/css/blog/post.css
index 0f48e03..3f078c5 100644
--- a/static/css/blog/post.css
+++ b/static/css/blog/post.css
@@ -192,9 +192,15 @@ table.hljs-ln {
   overflow: hidden;
 }
 
+/* Background for copy code button */
+.hljs-copy-button {
+  background-color: var(--bg) !important;
+}
+
 /* Light theme for the copy code button */
 @media (prefers-color-scheme: light) {
   .hljs-copy-button {
+    background-color: var(--font-color) !important;
     filter: invert(100%);
   }
 }