The default value is null.
This value can be null.
The UIView.BackgroundColor is the rear-most visible element of a UIKit.UIView, but developers should be aware that certain UIKit.UIView subclasses such as UIKit.UITableViewCell and UIKit.UICollectionViewCell have a UITableViewCell.BackgroundView that may obscure their UIView.BackgroundColor.
This member participates in the UIKit.UIAppearance styling system. See the UIView.Appearance property and the UIView.AppearanceWhenContainedIn method.