How to set background color for row in Laravel Excel?

I use Laravel Excel library and I have tried this code:

public function registerEvents(): array
{
    return [
        AfterSheet::class    => function(AfterSheet $event) {

            $styleArray =  array('fill' => array(
                'color' => array('rgb' => '000000')
            ));

            $cellRange = 'A1:W1'; // All headers
            $event->sheet->getDelegate()->getStyle($cellRange)->applyFromArray($styleArray);
        },
    ];
}

As result I get headers without black background color

via Chebli Mohamed