Well, the UITextView is a more advanced view that's scrollable and supports custom text formatting, so you might not be able to get it to 'not blend'. With other views you should check the opaque
checkbox, but I doubt if that will work in this case.
Your best bet would be to use a UILabel instead. You could replace it with a UITextView when the user needs to edit a field, but using UILabel while scrolling should improve the speed considerably.