UIImageを染める
let image:UIImage? = UIImage(named: "input_iconTest")
let iv:UIImageView = UIImageView(image:image!)
iv.paintColor = "ff0000"
self.view.addSubview(iv)

extension UIImageView {
    class func getUIColorByColorHex(colorHex:String) -> UIColor{
        let colorScanner:NSScanner = NSScanner(string: colorHex)
        var color:UInt32 = 0
        colorScanner.scanHexInt(&color)
        let r:CGFloat = CGFloat((color & 0xFF0000) >> 16) / CGFloat(255.0);
        let g:CGFloat = CGFloat((color & 0x00FF00) >> 8)  / CGFloat(255.0);
        let b:CGFloat = CGFloat(color & 0x0000FF) / CGFloat(255.0);
        return UIColor(red: r, green: g, blue: b, alpha: 1.0)
    }
    var paintColor:String{
        get{
            return ""
        }
        set{
            if self.image != nil {
                if newValue == "" {
                    self.image = self.image!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
                }else{
                    self.tintColor = UIImageView.getUIColorByColorHex(newValue)
                    self.image = self.image!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)
                }
            }
        }
    }
}