PHP | Spreadsheet_Excel_Writer | setColor() Function

<?php

// require_once 'Spreadsheet/Excel/Writer.php';

// Create Spreadsheet_Excel_Writer Object
$workbook  = new Spreadsheet_Excel_Writer();

// Add worksheet
$worksheet = &$workbook->addWorksheet('SetColor');

for ($inc = 0; $inc < 64; $inc++) {

    // Sets the color of a cell's content
    $format = $workbook->addFormat();
    $format->setColor($inc);
    $worksheet->write($inc, 0, 'Color (index '.$inc.')', $format);
}

// Send file to browser
$workbook->send('setColor.xls');

// Close workbook
$workbook->close();
?>

<?php

require_once 'Spreadsheet/Excel/Writer.php';

// Create Spreadsheet_Excel_Writer Object
$workbook  = new Spreadsheet_Excel_Writer();

// Add worksheet
$worksheet = &$workbook->addWorksheet('SetColor');

// Sets the color of a cell's content
$format = $workbook->addFormat();

// Set color to the text
$format->setColor(17);

// Set the size of text
$format->setSize(25);

// Add text to the excel
$worksheet->write(0, 5, 'GeeksForGeeks', $format);

// Sets the color of a cell's content
$format1 = $workbook->addFormat();

// Set color to the cell
$format1->setColor(2);

// Set the size of the text
$format1->setSize(20);

// Add text to the excel sheet
$worksheet->write(2, 5, 'sarthak_ishu11', $format1);

// Send file to browser
$workbook->send('test.xls');

// Close workbook
$workbook->close();
?>