The standard color objects for specific shades, such as red, blue, green, black, white, and more.
Use the standard color objects when you want to use a specific color shade in your UI.
The system color objects adapt automatically to Dark Mode changes when you use the provided
UIColor object, but the fixed-shade colors don't adapt. If you retrieve the color values, either directly or using another type such as
CGColor, you must handle Dark Mode changes yourself. For more information about supporting Dark Mode, see Supporting Dark Mode in Your Interface.