Morph from one UIColor to another

morphColor.swift

extension UIColor {
    
    // First extend UIColor to make it easier to get components out
    var coreImageColor: CIColor {
        return CIColor(color: self)
    }
    var components: (red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat) {
        let color = coreImageColor
        return (color.red, color.green, color.blue, color.alpha)
    }

    // Class method version
    static func morphColor(from first: UIColor, to second: UIColor, progress: CGFloat) -> UIColor {
        func morphComponent(from firstValue: CGFloat, to secondValue: CGFloat) -> CGFloat {
            let diff = secondValue - firstValue
            return diff * progress + firstValue
        }
        let newRed = morphComponent(from: first.components.red, to: second.components.red)
        let newGreen = morphComponent(from: first.components.green, to: second.components.green)
        let newBlue = morphComponent(from: first.components.blue, to: second.components.blue)
        let newAlpha = morphComponent(from: first.components.alpha, to: second.components.alpha)
        return UIColor(red: newRed, green: newGreen, blue: newBlue, alpha: newAlpha)
    }
    
    // Instance method version
    func morph(to second: UIColor, progress: CGFloat) -> UIColor {
        return UIColor.morphColor(from: self, to: second, progress: progress)
    }
}

// Usage - set up your beginning and ending colors, then morph!
let color1 = UIColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 0.5)
let color2 = UIColor(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)

let newColor = UIColor.morphColor(from:color1, to:color2, progress: 0.5)
let alternativeNewColor = color1.morph(to: color2, progress: 0.5)