BlockTableAlertView cell background color

[ScottEAdams]

Im really struggling with something that should be easy. How to change the color of the cell/tableView??

Tried the following with no luck

alert.tableView.backgroundView = nil;
alert.tableView.backgroundColor = [UIColor blackColor];

cell.backgroundView.backgroundColor = [UIColor blackColor];
cell.backgroundColor = [UIColor blackColor];
cell.textLabel.backgroundColor = [UIColor blackColor];