The Item Colors screen allows you to customize the colors used for the item on the item list screen. Setting a color for the item overrides and other color.
The top portion of the screen displays the item. As you change the background, title, subtitle colors the item will show you how it will look.
No changes are made until the Save button is tapped. If you decide you don't wish to keep any changes you have made then tap the Cancel button.
Setting one of the colors is done by tapping the option you wish to set and picking a color from the color chooser. Picking Default removes any item specific color.