Controls the background color for hatch patterns.

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 PANTONE color books, the DIC color guide, or RAL color sets, for example "DIC COLOR GUIDE(R)$DIC 43"