UIColor extension to add .random & .inverted static and computed variables, respectively.

UIColorRandom+Inverted.swift

import UIKit
// Extension adding class var random & computed property inverted to UIColor
extension UIColor {
    static var random: UIColor {
        UIColor(red: .random(in: 0...1), green: .random(in: 0...1), blue: .random(in: 0...1), alpha: .random(in: 0...1))
    }
    
    static var randomSolid: UIColor {
        UIColor(red: .random(in: 0...1), green: .random(in: 0...1), blue: .random(in: 0...1), alpha: 1.0)
    }
    
    var inverted: UIColor {
        var a: CGFloat = 0.0, r: CGFloat = 0.0, g: CGFloat = 0.0, b: CGFloat = 0.0
        return getRed(&r, green: &g, blue: &b, alpha: &a) ? UIColor(red: 1.0-r, green: 1.0-g, blue: 1.0-b, alpha: a) : .black
    }
}

Example usage, changing a view's background color:

view.backgroundColor = .blue.inverted //Results in yellow background color *
view.backgroundColor = .random //Results in random background color

* .blue.inverted may need to be prefixed with UIColor, depending on Xcode version