diff --git a/asciinema/theme/custom.css b/asciinema/theme/custom.css
index 98f39c2..6ae161d 100644
--- a/asciinema/theme/custom.css
+++ b/asciinema/theme/custom.css
@@ -85,6 +85,13 @@ nav,
   background-color: var(--metal-bg-elevated) !important;
 }
 
+/* Override asciinema's .l-app header .navbar.bg-dark black background */
+.l-app header .navbar.bg-dark,
+.l-app header .navbar-dark.bg-dark,
+.l-app header nav.navbar.bg-dark {
+  background-color: var(--metal-bg-elevated) !important;
+}
+
 .navbar,
 .nav-link {
   color: var(--metal-text-primary) !important;