diff --git a/theme.css b/theme.css
index 506ae9fb07..6aece064ef 100644
--- a/theme.css
+++ b/theme.css
@@ -51,7 +51,7 @@
 :root {
   --body-background-color: #004a99;
   --body-text-color: #cce6ff;
-  --card-background-color: #004a99;
+  --card-background-color: #80c1ff40;
   --nav-background-color: #004a99;
   --nav-border-bottom-color: transparent;
   --nav-current-border-bottom-color: transparent;