How to set cell color in phpExcel - php

Question

I am using phpexcel library for generate excel file and i want change background color of call
How to set specific color to active cell when creating XLS document in PHPExcel?
here id my code which i am using
public function exportCSV() {
// create file name
$fileName = 'data-'.time().'.xlsx';
// load excel library
$this->load->library('excel');
// $listInfo = $this->export->exportList();
$ordersData = $this->admin_development->getDevelopmentDetails();
$objPHPExcel = new PHPExcel();
$objPHPExcel->setActiveSheetIndex(0);
// set Header
$objPHPExcel->getActiveSheet()->SetCellValue('A1', 'Lott Number');
$objPHPExcel->getActiveSheet()->SetCellValue('B1', 'Slot Number');
$objPHPExcel->getActiveSheet()->SetCellValue('C1', 'Party Name');
// set Row
$rowCount = 2;
foreach ($ordersData as $list) {
$objPHPExcel->getActiveSheet()->SetCellValue('A' . $rowCount, $list->lott_number);
$objPHPExcel->getActiveSheet()->SetCellValue('B' . $rowCount, $list->category);
$objPHPExcel->getActiveSheet()->SetCellValue('C' . $rowCount, $list->party_name);
$objPHPExcel->getActiveSheet()
->getStyle('A' . $rowCount)
->getFill()
->setFillType(PHPExcel_Style_Fill::FILL_SOLID)
->getStartColor()
->setRGB('FF0000');
$rowCount++;
}
$filename = "tutsmake". date("Y-m-d-H-i-s").".csv";
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="'.$filename.'"');
header('Cache-Control: max-age=0');
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'CSV');
$objWriter->save('php://output');
}