You need to add three separate series, each configured with a different colour: 
my @colors = ('#ED7D31', '#4472C4', '#00B050');

for my $series (1 .. 3) {
    my $from = 12 * $series - 10;
    my $to   = $series * 12 + 1;
    $chart->add_series(
      name        => '=C!$B$1',  # Not sure about this one.
      categories  => '=C!$A$' . $from . ':$A$' . $to,
      values      => '=C!$B$' . $from . ':$B$' . $to,
      fill        => {color => $colors[ $series - 1 ]},
      data_labels => {value => 1},
      gap         =>  40,
    );
}

[download]

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: How to use Perl to assign different fill colors to columns in the same series of an Excel chart? by choroba
in thread How to use Perl to assign different fill colors to columns in the same series of an Excel chart? by CoVAX

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