Random color from UIColor

UIColor+random.swift

import UIKit

extension UIColor {
    
    static func random() -> UIColor {
        switch (arc4random_uniform(15)) {
        case 0:
            return UIColor.blackColor()
        case 1:
            return UIColor.darkGrayColor()
        case 2:
            return UIColor.lightGrayColor()
        case 3:
            return UIColor.whiteColor()
        case 4:
            return UIColor.grayColor()
        case 5:
            return UIColor.redColor()
        case 6:
            return UIColor.greenColor()
        case 7:
            return UIColor.blueColor()
        case 8:
            return UIColor.cyanColor()
        case 9:
            return UIColor.yellowColor()
        case 10:
            return UIColor.magentaColor()
        case 11:
            return UIColor.orangeColor()
        case 12:
            return UIColor.purpleColor()
        case 13:
            return UIColor.brownColor()
        default:
            return UIColor.clearColor()
        }
    }
}