Check this out:

ID: TS1056445

You would like to know how to export visual styles to other machines.

Solution
To share visual styles between machines, you should add them to a Tool Palette, and then export the Palette as an *.xpg file.

Follow these steps:

• Create or modify an existing visual style in Visual Styles Manager.
• Drag the new visual style from the Visual Styles Manager to a Tool Palette.
• Export the Tool Palette.
• Copy the exported Tool Palette to the new machine.
• The users accessing this exported Tool Palette can then apply the visual style to the current drawing by dragging it into the drawing area.

Autodesk - AutoCAD - Sharing visual styles