diff --git a/themes/learn2-dark/css/custom.css b/themes/learn2-dark/css/custom.css
index c2b9323..cc0139b 100644
--- a/themes/learn2-dark/css/custom.css
+++ b/themes/learn2-dark/css/custom.css
@@ -51,7 +51,7 @@ code {
   background: #222222;
 }
 .copy-to-clipboard {
-  background-color: #111111;
+  background-color: #111111 !important; /* overwrite prism.css background color */
   background-image: url(../images/clippy-white.svg);
   /*
     makes "copy" button fit slightly better imo
@@ -99,3 +99,8 @@ select[multiple="multiple"]:focus {
 blockquote {
   border-left: 10px solid #9c5ea2;
 }
+
+/* disable "copy"-button on hover */
+div.code-toolbar:hover > .toolbar {
+  opacity: 0;
+}