Initialise Display P3 UIColors using HSBA values

UIColor+DisplayP3Hue.swift

import UIKit

extension UIColor {
    
    convenience init(displayP3Hue hue: CGFloat, saturation: CGFloat, brightness: CGFloat, alpha: CGFloat = 1) {
        
        // Bound colours to range of [0–1]
        let newHue =        max(0, min(1, hue))
        let newSaturation = max(0, min(1, saturation))
        let newBrightness = max(0, min(1, brightness))
        let newAlpha =      max(0, min(1, alpha))
        
        // Instantiate regular HSBA colour
        let hsbaColor = UIColor(hue: newHue, saturation: newSaturation, brightness: newBrightness, alpha: newAlpha)
        
        // Extract corresponding RGBA values and instantiate wide colour
        var (red, green, blue, alpha): (CGFloat, CGFloat, CGFloat, CGFloat) = (0, 0, 0, 0)
        
        // Can this fail? Dunno.
        _ = hsbaColor.getRed(&red, green: &green, blue: &blue, alpha: &alpha)
        
        self.init(displayP3Red: red, green: green, blue: blue, alpha: alpha)
        
    }
    
}

let rgbaValues: (CGFloat, CGFloat, CGFloat, CGFloat) = (178/255, 055/255, 176/255, 1)
let hsbaValues: (CGFloat, CGFloat, CGFloat, CGFloat) = (301/360, 069/100, 070/100, 1)

let randomRGBA = UIColor(red: rgbaValues.0, green: rgbaValues.1, blue: rgbaValues.2, alpha: rgbaValues.3)
let randomHSBA = UIColor(hue: hsbaValues.0, saturation: hsbaValues.1, brightness: hsbaValues.2, alpha: hsbaValues.3)

let displayP3RandomRGBA = UIColor(displayP3Red: rgbaValues.0, green: rgbaValues.1, blue: rgbaValues.2, alpha: rgbaValues.3)
let displayP3RandomHSBA = UIColor(displayP3Hue: hsbaValues.0, saturation: hsbaValues.1, brightness: hsbaValues.2, alpha: hsbaValues.3)