diff --git a/core/core-frontend/src/components/visualization/OuterParamsSet.vue b/core/core-frontend/src/components/visualization/OuterParamsSet.vue
index fb0ed6a2e8..717fb98f2f 100644
--- a/core/core-frontend/src/components/visualization/OuterParamsSet.vue
+++ b/core/core-frontend/src/components/visualization/OuterParamsSet.vue
@@ -618,7 +618,7 @@ defineExpose({
 }
 
 :deep(.ed-tree--highlight-current .ed-tree-node.is-current > .ed-tree-node__content) {
-  background-color: #8dbbef !important;
+  background-color: rgba(51, 112, 255, 0.1) !important;
 }
 
 .tree-content ::deep(.ed-input__inner) {