diff --git a/packages/plugin-outline-pane/src/views/style.less b/packages/plugin-outline-pane/src/views/style.less
index 15f115ea6..8521883b4 100644
--- a/packages/plugin-outline-pane/src/views/style.less
+++ b/packages/plugin-outline-pane/src/views/style.less
@@ -28,7 +28,7 @@
     }
 
     .lc-outline-filter-icon {
-      background: var(--color-block-background-shallow, #ebecf0);
+      background: var(--color-block-background-light, #ebecf0);
       border: 1px solid var(--color-field-border, #c4c6cf);
       display: flex;
       align-items: center;