required init(coder aDecoder: NSCoder) {
   
    let colorArray = aDecoder.decodeObjectForKey("colors") as! [CGFloat]
    self.CGColor = CGColorCreate(CGColorSpaceCreateDeviceRGB(), colorArray)

    super.init()
}
    
func encodeWithCoder(aCoder: NSCoder) {
        
    let colors = CGColorGetComponents(CGColor)
    let colorBuffer = UnsafeBufferPointer(start: colors, count: 4)
    let colorArray = [CGFloat](colorBuffer)
      
    aCoder.encodeObject(colorArray, forKey: "colors")
 }