Protocols of Gradient Game

GradientGameColorProtocol.swift

import SwiftUI

protocol ColorProtocol {
    var red: Double { get set }
    var green: Double { get set }
    var blue: Double { get set }

    func newColor() -> Color
}

extension ColorProtocol {
    func newColor() -> Color {
        Color(red: red, green: green, blue: blue, opacity: 1.0)
    }
}

GradientGameGradientProtocol.swift

import SwiftUI

protocol GradientProtocol {
    var leftColor: ColorProtocol { get set }
    var rightColor: ColorProtocol { get set }

    func newGradient() -> Gradient
}

extension GradientProtocol {
    func newGradient() -> Gradient {
        Gradient(colors: [leftColor.newColor(), rightColor.newColor()])
    }
}