diff --git a/app/views/collections/show/_column.html.erb b/app/views/collections/show/_column.html.erb
index ace6be59e..670db2e03 100644
--- a/app/views/collections/show/_column.html.erb
+++ b/app/views/collections/show/_column.html.erb
@@ -1,5 +1,5 @@
 <section id="<%= dom_id(column) %>"
-  class="cards cards--doing is-collapsed" style="--card-color: <%= column.color %> %>"
+  class="cards cards--doing is-collapsed" style="--card-color: <%= column.color %>;"
   data-drag-and-drop-target="container"
   data-collapsible-columns-target="column"
   data-action="turbo:before-morph-attribute->collapsible-columns#preventToggle"