cocoa:如何在不使用CALayer的情况下将视图的背景颜色设置为可可的浅绿色？

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()

        // 设置视图的背景颜色为可可的浅绿色
        view.backgroundColor = UIColor(red: 153/255, green: 204/255, blue: 153/255, alpha: 1)
    }
}