VSOBSCUREDCOLOR (System Variable)

Specifies the color of obscured (hidden) lines in the visual style applied to the current viewport.

Type:	String
Saved in:	Drawing
Initial value:	BYENTITY

Valid values include ByLayer (256), ByBlock (0), ByEntity (257), and any AutoCAD Color Index (ACI) color (an integer from 1 to 255).

You can also specify a true color or a color book color. Valid values for true colors are a string of integers each from 1 to 255 separated by commas and preceded by RGB. The True Color setting is entered as follows:

RGB:000,000,000

NOTE:

When VSFACESTYLE is set to 0, setting the VSOBSCUREDCOLOR system variable to the same value as the VSEDGECOLOR system variable will result in enhanced 3D performance for pan, zoom, and orbit operations.
Existing visual styles are not changed when you enter a new value for this system variable. Any new value entered for this system variable temporarily creates an unsaved new visual style.