diff --git a/src/vs/editor/contrib/gotoSymbol/peek/referencesWidget.ts b/src/vs/editor/contrib/gotoSymbol/peek/referencesWidget.ts
index 82f86384de484c83ae16dd85680b5a6acc1e62bf..801847894744fbc0363552245e5502dd4a226dff 100644
--- a/src/vs/editor/contrib/gotoSymbol/peek/referencesWidget.ts
+++ b/src/vs/editor/contrib/gotoSymbol/peek/referencesWidget.ts
@@ -302,7 +302,10 @@ export class ReferenceWidget extends peekView.PeekViewWidget {
 			keyboardSupport: this._defaultTreeKeyboardSupport,
 			accessibilityProvider: new AriaProvider(),
 			keyboardNavigationLabelProvider: this._instantiationService.createInstance(StringRepresentationProvider),
-			identityProvider: new IdentityProvider()
+			identityProvider: new IdentityProvider(),
+			// overrideStyles: {
+			// 	listBackground: peekView.peekViewResultsBackground
+			// }
 		};
 		this._tree = this._instantiationService.createInstance<typeof WorkbenchAsyncDataTree, WorkbenchAsyncDataTree<ReferencesModel | FileReferences, TreeElement, FuzzyScore>>(
 			WorkbenchAsyncDataTree,
@@ -314,7 +317,7 @@ export class ReferenceWidget extends peekView.PeekViewWidget {
 				this._instantiationService.createInstance(OneReferenceRenderer),
 			],
 			this._instantiationService.createInstance(DataSource),
-			treeOptions
+			treeOptions,
 		);
 
 		// split stuff
diff --git a/src/vs/workbench/browser/parts/editor/breadcrumbsPicker.ts b/src/vs/workbench/browser/parts/editor/breadcrumbsPicker.ts
index 0541cf5d15781b67fbdc450d5a812e87caa7d5b4..4112f90a56750e6c38c11e81b0fa18d556e32872 100644
--- a/src/vs/workbench/browser/parts/editor/breadcrumbsPicker.ts
+++ b/src/vs/workbench/browser/parts/editor/breadcrumbsPicker.ts
@@ -379,7 +379,10 @@ export class BreadcrumbsFilePicker extends BreadcrumbsPicker {
 			sorter: new FileSorter(),
 			filter: this._instantiationService.createInstance(FileFilter),
 			identityProvider: new FileIdentityProvider(),
-			keyboardNavigationLabelProvider: new FileNavigationLabelProvider()
+			keyboardNavigationLabelProvider: new FileNavigationLabelProvider(),
+			overrideStyles: {
+				listBackground: breadcrumbsPickerBackground
+			}
 		});
 	}
 
diff --git a/src/vs/workbench/contrib/callHierarchy/browser/callHierarchyPeek.ts b/src/vs/workbench/contrib/callHierarchy/browser/callHierarchyPeek.ts
index e03100082b02322748638224b696210cb9ab3d3f..0acf0db2fc74bd74635917f4efdd1ad532c4e1e7 100644
--- a/src/vs/workbench/contrib/callHierarchy/browser/callHierarchyPeek.ts
+++ b/src/vs/workbench/contrib/callHierarchy/browser/callHierarchyPeek.ts
@@ -199,6 +199,9 @@ export class CallHierarchyTreePeekWidget extends peekView.PeekViewWidget {
 			identityProvider: new callHTree.IdentityProvider(() => this._direction),
 			ariaLabel: localize('tree.aria', "Call Hierarchy"),
 			expandOnlyOnTwistieClick: true,
+			// overrideStyles: {
+			// 	listBackground: peekView.peekViewResultsBackground
+			// }
 		};
 		this._tree = this._instantiationService.createInstance<typeof WorkbenchAsyncDataTree, WorkbenchAsyncDataTree<CallHierarchyModel, callHTree.Call, FuzzyScore>>(
 			WorkbenchAsyncDataTree,
diff --git a/src/vs/workbench/contrib/outline/browser/outlinePanel.ts b/src/vs/workbench/contrib/outline/browser/outlinePanel.ts
index 75777a0e8e7e91f445cf72b391635e2b9f5193ef..9d563e905c0b9bce0938b6ef3646af47e61a0a5b 100644
--- a/src/vs/workbench/contrib/outline/browser/outlinePanel.ts
+++ b/src/vs/workbench/contrib/outline/browser/outlinePanel.ts
@@ -47,6 +47,7 @@ import { basename } from 'vs/base/common/resources';
 import { IDataSource } from 'vs/base/browser/ui/tree/tree';
 import { IMarkerDecorationsService } from 'vs/editor/common/services/markersDecorationService';
 import { MarkerSeverity } from 'vs/platform/markers/common/markers';
+import { SIDE_BAR_BACKGROUND } from 'vs/workbench/common/theme';
 
 class RequestState {
 
@@ -331,7 +332,10 @@ export class OutlinePanel extends ViewletPanel {
 				filter: this._treeFilter,
 				identityProvider: new OutlineIdentityProvider(),
 				keyboardNavigationLabelProvider: new OutlineNavigationLabelProvider(),
-				hideTwistiesOfChildlessElements: true
+				hideTwistiesOfChildlessElements: true,
+				overrideStyles: {
+					listBackground: SIDE_BAR_BACKGROUND
+				}
 			}
 		);