diff --git a/app/helpers/messages_helper.rb b/app/helpers/messages_helper.rb
index a8a7544ac..9dae7757c 100644
--- a/app/helpers/messages_helper.rb
+++ b/app/helpers/messages_helper.rb
@@ -2,7 +2,7 @@ module MessagesHelper
   def messages_tag(card, &)
     turbo_frame_tag dom_id(card, :messages),
       class: "comments gap center",
-      style: "--card-color: <%= card.color %>",
+      style: "--card-color: #{card.color}",
       role: "group", aria: { label: "Messages" },
       data: {
         controller: "created-by-current-user",