diff --git a/packages/api/src/nitro/room/utils/IRoomAreaSelectionManager.ts b/packages/api/src/nitro/room/utils/IRoomAreaSelectionManager.ts
index 88caf85b..90f09238 100644
--- a/packages/api/src/nitro/room/utils/IRoomAreaSelectionManager.ts
+++ b/packages/api/src/nitro/room/utils/IRoomAreaSelectionManager.ts
@@ -3,6 +3,7 @@ import { INitroEvent } from '../../../common';
 export interface IRoomAreaSelectionManager
 {
     startSelecting(): void;
+    clearHighlight(): void;
     handleTileMouseEvent(event: INitroEvent): void;
     finishSelecting(): boolean;
     activate(callback: (rootX: number, rootY: number, width: number, height: number) => void, highlightType: string): boolean;
diff --git a/packages/room/src/utils/RoomAreaSelectionManager.ts b/packages/room/src/utils/RoomAreaSelectionManager.ts
index 8ac67841..e052f97b 100644
--- a/packages/room/src/utils/RoomAreaSelectionManager.ts
+++ b/packages/room/src/utils/RoomAreaSelectionManager.ts
@@ -47,15 +47,30 @@ export class RoomAreaSelectionManager implements IRoomAreaSelectionManager
 
         const brightenFilter = new ColorMatrixFilter();
 
-        brightenFilter.matrix = [1.5, 0, 0, 0, 0, 0, 1.5, 0, 0, 20, 0, 0, 1.5, 0, 20, 0, 0, 0, 1, 0];
+        brightenFilter.matrix = [
+            1.5, 0, 0, 0,
+            0, 1.5, 0, 0,
+            0, 0, 1.5, 0,
+            0, 0, 0, 1,
+            0, 0.0784, 0.0784, 0];
 
         const blueFilter = new ColorMatrixFilter();
 
-        brightenFilter.matrix = [1.05, 0, 0, 0, 0, 0, 1.3, 0, 0, 8, 0, 0, 1.8, 0, 20, 0, 0, 0, 1, 0];
+        blueFilter.matrix = [
+            1.05, 0, 0, 0,
+            0, 1.3, 0, 0,
+            0, 0, 1.8, 0,
+            0, 0, 0, 1,
+            0, 0.0314, 0.0784, 0];
 
         const darkenFilter = new ColorMatrixFilter();
 
-        brightenFilter.matrix = [0.55, 0, 0, 0, -10, 0, 0.55, 0, 0, -10, 0, 0, 0.55, 0, -10, 0, 0, 0, 1, 0];
+        darkenFilter.matrix = [
+            0.55, 0, 0, 0,
+            0, 0.55, 0, 0,
+            0, 0, 0.55, 0,
+            0, 0, 0, 1,
+            -0.0392, -0.0392, -0.0392, 0];
 
         RoomAreaSelectionManager.HIGHLIGHT_FILTERS[RoomAreaSelectionManager.HIGHLIGHT_DARKEN] = darkenFilter;
         RoomAreaSelectionManager.HIGHLIGHT_FILTERS[RoomAreaSelectionManager.HIGHLIGHT_BRIGHTEN] = brightenFilter;