diff --git a/src/Common/ColorPalette.ts b/src/Common/ColorPalette.ts
index 56750b747..91ec0fd6f 100644
--- a/src/Common/ColorPalette.ts
+++ b/src/Common/ColorPalette.ts
@@ -413,7 +413,7 @@ export class ColorMaterial
     static GetConceptualEdgeMaterial()
     {
         if (!this._ConceptualEdgeMaterial)
-            this._ConceptualEdgeMaterial = new LineBasicMaterial({ color: this.GetColor(HostApplicationServices.ConceptualEdgeColor).clone(), side: DoubleSide });
+            this._ConceptualEdgeMaterial = new LineBasicMaterial({ color: this.GetColor(HostApplicationServices.ConceptualEdgeColor), side: DoubleSide });
 
         return this._ConceptualEdgeMaterial;
     }
@@ -426,7 +426,7 @@ export class ColorMaterial
     static GetPhysical2EdgeMaterial()
     {
         if (!this._Physical2EdgeMaterial)
-            this._Physical2EdgeMaterial = new LineBasicMaterial({ color: this.GetColor(HostApplicationServices.Physical2EdgeColor).clone(), side: DoubleSide });
+            this._Physical2EdgeMaterial = new LineBasicMaterial({ color: this.GetColor(HostApplicationServices.Physical2EdgeColor), side: DoubleSide });
 
         return this._Physical2EdgeMaterial;
     }