Returns an <code>RGBA</code> representing the receiver.
@return the RGBA for the color
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul> @since 3.104
See Implementation
Returns an <code>RGBA</code> representing the receiver.
@return the RGBA for the color
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul> @since 3.104