diff --git a/toolkit/themes/shared/tree/tree.css b/toolkit/themes/shared/tree/tree.css
index 54a53c36de93334af9b2238d461ca5a1d154419d..c4f801c8eec988c61eede60e51ad9f9127fe4e66 100644
--- a/toolkit/themes/shared/tree/tree.css
+++ b/toolkit/themes/shared/tree/tree.css
@@ -12,6 +12,7 @@
 /* ::::: tree ::::: */
 
 tree {
+  --color-accent-primary: var(--zen-primary-color, inherit);
   margin: 0 4px;
   background-color: Field;
   color: FieldText;