It is from System.Drawing namespace in addition to used inward SolidBrush Class. Its usage syntax inward .NET for Windows Universal is: Windows.UI.Color.FromArgb(byte,byte,byte,byte) In the above, the commencement declaration is the alpha channel(transparency) that runs from 0 to 255; the side yesteryear side 3 are red, greenish in addition to bluish channels inward that guild each from 0 to 255. For example: Windows.UI.Color.FromArgb(75, 255, 0,0) produces Background colouring textile 'red' alongside a transparency of 75.