您好，以下是各种UIColor颜色的设置： - blackColor - darkGrayColor - lightGrayColor - whiteColor - grayColor - redColor - greenColor - blueColor

以下是根据提供的内容重构的代码：

```swift

import UIKit

class ColorUtils {

static let blackColor = UIColor.black

static let darkGrayColor = UIColor.darkGray

static let lightGrayColor = UIColor.lightGray

static let whiteColor = UIColor.white

static let grayColor = UIColor.gray

static let redColor = UIColor.red

static let greenColor = UIColor.green

static let blueColor = UIColor.blue

static let cyanColor = UIColor.cyan

static let yellowColor = UIColor.yellow

static let magentaColor = UIColor.magenta

static let orangeColor = UIColor.orange

static let purpleColor = UIColor.purple

static let brownColor = UIColor.brown

static let clearColor = UIColor.clear

static let lightTextColor = UIKit.UIColor.lightText

static let darkTextColor = UIKit.UIColor.darkText

static let groupTableViewBackgroundColor = UIKit.UIColor.groupTableViewBackground

static let viewFlipsideBackgroundColor = UIKit.UIColor.viewFlipsideBackground

static let scrollViewTexturedBackgroundColor = UIKit.UIColor.scrollViewTexturedBackground

static let underPageBackgroundColor = UIKit.UIColor.underPageBackground

}

```