Swift: Blend 2 Color Together

ColorUtils.swift

class func blendColor(color1: UIColor, withColor color2: UIColor) -> UIColor {
    var r1:CGFloat = 0, g1:CGFloat = 0, b1:CGFloat = 0, a1:CGFloat = 0
    var r2:CGFloat = 0, g2:CGFloat = 0, b2:CGFloat = 0, a2:CGFloat = 0
    
    color1.getRed(&r1, green: &g1, blue: &b1, alpha: &a1)
    color2.getRed(&r2, green: &g2, blue: &b2, alpha: &a2)
    
    return UIColor(red: max(r1, r2), green: max(g1, g2), blue: max(b1, b2), alpha: max(a1, a2))
}