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iOS Build a Playlist Browser with Objective-C Building a Music Library Model Creating a Music Library

Why not use instances of UIColor for background colors instead of dictionaries?

Why not use "kBackgroundColor: [UIColor colorWithRed:255/255.0 green:204/255.0 blue:51/255.0 alpha:1.0]" instead of "kBackgroundColor: @{@"red": @255.0, @"green": @204.0, @"blue": @51.0, @"alpha": @1.0}"?