UITableViewCell Background Color is a different shade at left and right edges of cell

UITableViewCell Background Color is a different shade at left and right
edges of cell

I'm setting the background color of a cell in tableview:willDisplayCell
and I'm getting the color I want. However, the left and right edges of the
cell are a different shade and I'm not sure why. Does anyone have any
ideas why the shade of the background color would be different on the
edges of the cell? Thanks
- (void)tableView:(UITableView *)tableView
willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath
*)indexPath
{
cell.backgroundColor = [UIColor colorWithRed:.9333333 green:.46666667
blue:.43137225 alpha:0.5];
}