Index: Ringtoets/Piping/src/Ringtoets.Piping.Primitives/PipingSoilLayer.cs
===================================================================
diff -u -r5906f61fff270a7526253bea07dfecdf680898ed -rec27d9f02dc27c2829ed45788fae7d5923d63d3d
--- Ringtoets/Piping/src/Ringtoets.Piping.Primitives/PipingSoilLayer.cs	(.../PipingSoilLayer.cs)	(revision 5906f61fff270a7526253bea07dfecdf680898ed)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Primitives/PipingSoilLayer.cs	(.../PipingSoilLayer.cs)	(revision ec27d9f02dc27c2829ed45788fae7d5923d63d3d)
@@ -138,11 +138,8 @@
             {
                 return true;
             }
-            if (obj.GetType() != GetType())
-            {
-                return false;
-            }
-            return Equals((PipingSoilLayer) obj);
+            var other = obj as PipingSoilLayer;
+            return other != null && Equals((PipingSoilLayer) obj);
         }
 
         public override int GetHashCode()
@@ -176,7 +173,7 @@
                    && DiameterD70CoefficientOfVariation.Equals(other.DiameterD70CoefficientOfVariation)
                    && PermeabilityMean.Equals(other.PermeabilityMean)
                    && PermeabilityCoefficientOfVariation.Equals(other.PermeabilityCoefficientOfVariation)
-                   && Color.Equals(other.Color);
+                   && Color.ToArgb().Equals(other.Color.ToArgb());
         }
     }
 }
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