Controls the background color for hatch patterns. 
| Type: | String | 
| Saved in: | Drawing | 
| Initial value: |  None | 
Valid values include the following: 
- “None” or “.” for no background color 
 
- AutoCAD Color Index (ACI): integer values from 1 to 255, or a color name from the first seven colors 
 
- True Colors: RGB or HSL values from 000 to 255 in the form "RGB:130,200,240" 
 
- Color Books: Text from standard color books, guides, or sets, for example "DIC COLOR GUIDE(R)$DIC 43"