ColorFormat.Brightness Property (Excel)
Returns or sets the luminosity of the specified object. Read/write
Version Information
Version Added: Excel 2010
Syntax
expression .Brightness
expression A variable that represents a ColorFormat object.
Return Value
Single
Remarks
The value for this property must be a number from 0.0 (dimmest) to 1.0 (brightest).
Example
The following code example sets the brightness of the fill color for the first shape in the active worksheet.
ActiveSheet.Shapes(1).Fill.ForeColor.Brightness = 0.5