The color of the current canvas theme used to render elements when some aspect of their properties is currently being recalculated. 
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2020.1 
Syntax
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentNullException | When setting this property: A non-optional argument was null |