UIColor with RGB

gistfile1.swift

// Pattern A func
func rgb(red r: CGFloat, green g: CGFloat, blue b: CGFloat) -> UIColor {
    return rgba(red: r, green: g, blue: b, alpha: 1.0)
}

func rgba(red r: CGFloat, green g: CGFloat, blue b: CGFloat, alpha a: CGFloat) -> UIColor {
    return UIColor(red: r/255.0, green: g/255.0, blue: b/255.0, alpha: a)
}

// Pattern B Extension
extension UIColor {
    convenience init(r: CGFloat, g: CGFloat, b: CGFloat) {
        self.init(r: r, g: g, b: b, a: 1.0)
    }

    convenience init(r: CGFloat, g: CGFloat, b: CGFloat, a: CGFloat) {
        self.init(red: r/255.0, green: g/255.0, blue: b/255.0, alpha: a);
    }
}