my %opts = (bg_color => $front_color,
		align => "center",
		pattern  => $pattern,
	);

    #  Add and define a format
    my $format_2 = $workbook->add_format(%opts);

##</code><code>##

my $sRGB = $parser->ColorIdxToRGB($format->{Fill}->[2]);
my $sRGB_2 = $workbook->color_idx_to_rgb($format->{Fill}->[2]);

##</code><code>##

my $backgroundcolor = $workbook->set_custom_color($back_color,
						      $sRGB);

##</code><code>##

    my %opts = (bg_color => "ffff00",
		align => "center",
		pattern  => $pattern,
	);

    #  Add and define a format
    my $format_2 = $workbook->add_format(%opts);

##</code><code>##

#!/usr/bin/perl
use strict;
use warnings;
use Spreadsheet::WriteExcel;
use Spreadsheet::ParseExcel;

my $parser          = Spreadsheet::ParseExcel->new();
my $workbook_parse  = $parser->Parse( 'Report.xls' );
my $worksheet_parse = $workbook_parse->Worksheet("Sheet1");
my ( $col_min, $col_max ) = $worksheet_parse->col_range();
my ( $row_min, $row_max ) = $worksheet_parse->row_range();

for my $col ( $col_min .. $col_max ) {

    for my $row ( $row_min .. $row_max ) {

    # Return the cell object at $row and $col

    my $cell = $worksheet_parse->get_cell( $row, $col );
    next unless $cell;

    my $value           = $cell->value();
    my $format          = $cell->get_format();

    # Create a new Excel workbook
    my $workbook = Spreadsheet::WriteExcel->new( 'perl.xls' );

    # Add a worksheet
    my $worksheet = $workbook->add_worksheet( "Health_Report" );

    my $pattern     = $format->{Fill}->[0];
    my $front_color = $format->{Fill}->[1];
    my $back_color  = $format->{Fill}->[2];

    my $sRGB = $parser->ColorIdxToRGB($format->{Fill}->[2]);

    my $backgroundcolor = $workbook->set_custom_color($back_color,
						      $sRGB);

    use Color::Rgb;
    # Linux rgb file (I do not know if same directory in WindowsOS)
    my $rgb = new Color::Rgb(rgb_txt=>'/etc/X11/rgb.txt');
    my $yellow_hex = $rgb->hex('yellow');

    print "RGB Yellow: " . $yellow_hex . "\n";
    print "RGB Excel: " . $sRGB . "\n";
    print "RGB int: " . $backgroundcolor . "\n";

    my %opts = (bg_color => $front_color,
		align => "center",
		pattern  => $pattern,
	);

    #  Add and define a format
    my $format_2 = $workbook->add_format(%opts);

    # Write a formatted and unformatted string, row and column notation.
    $worksheet->write($row, $col, $value, $format_2);
    }
}

__END__

$ perl excel.pl
RGB Yellow: ffff00
RGB Excel: FFFF00
RGB int: 34