Represents the Workbook Object Model background fill definition.
constructor(): WorkbookFill
Initializes a new instance of the WorkbookFill class.
Gets or sets the fill color.
For export, the color can be specified in any valid HTML format like 6-character dash notation or rgb/rgba/hsl/hsla functional form. In case of rgba/hsla representations, specified alpha channel value is ignored.
For import, a value is always represented in the HTML 6-character dash notation, for example, "#afbfcf".