Color.FromScRgb Method (Single, Single, Single, Single)
Creates a new Color structure by using the specified ScRGB alpha channel and color channel values.
Assembly: PresentationCore (in PresentationCore.dll)
The alpha channel of a color determines the amount of transparency of the color. An alpha value of 1 indicates that the color is completely opaque, and a value of 0 indicates that the color is completely transparent.
Available since 3.0