diff --git a/change/@fluentui-react-tree-de646a25-22e4-434f-aef4-f18a5f6b207d.json b/change/@fluentui-react-tree-de646a25-22e4-434f-aef4-f18a5f6b207d.json
new file mode 100644
index 00000000000000..40ce1e1783b34e
--- /dev/null
+++ b/change/@fluentui-react-tree-de646a25-22e4-434f-aef4-f18a5f6b207d.json
@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "chore: improve High Contrast on focus indicator",
+  "packageName": "@fluentui/react-tree",
+  "email": "bernardo.sunderhus@gmail.com",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/react-components/react-tree/library/src/components/TreeItem/useTreeItemStyles.styles.ts b/packages/react-components/react-tree/library/src/components/TreeItem/useTreeItemStyles.styles.ts
index 22d1afc695dbbc..78cfa127c9a9e5 100644
--- a/packages/react-components/react-tree/library/src/components/TreeItem/useTreeItemStyles.styles.ts
+++ b/packages/react-components/react-tree/library/src/components/TreeItem/useTreeItemStyles.styles.ts
@@ -32,6 +32,9 @@ const useBaseStyles = makeResetStyles({
     {
       borderRadius: tokens.borderRadiusMedium,
       outlineColor: tokens.colorStrokeFocus2,
+      '@media (forced-colors: active)': {
+        outlineColor: 'Highlight',
+      },
       outlineRadius: tokens.borderRadiusMedium,
       // FIXME: tokens.strokeWidthThick causes some weird bugs
       outlineWidth: '2px',