Problem: Using the TileList component (or other List Base components) a light blue color appears when you rollover an item and a dark blue when you select it.
You want remove them to implement your own graphic effects.
Solution: Extend TileList Component and override drawSelectionIndicator() and drawHighlightIndicator methods() methods
Following an image to recognize the issue:

Problem: when you bind the data property inside an itemRenderer you got the following message:
warning: unable to bind to property ‘label’ on class ‘String’ (class is not an IEventDispatcher)

Solution: populate the data Provider using a Value Objects