Thanks, but I have tried this already and didn't work. I should have given more info- I am using Venn::Chart for creating Venn diagrams. This module uses GD to draw the charts.

#!/usr/bin/perl
  use warnings;
  use Carp;
  use strict;
  
  use Venn::Chart;
  
(A) # Create the Venn::Chart constructor
  my $venn_chart = Venn::Chart->new( 500, 500 ) or die("error : $!"); 
+  

(B) my $venn_chart = Venn::Chart->new( 500, 500,1 ) or die("error : $!
+");
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I have tried both ways- A and B. Could it be that Venn::Chart is using default 8-bit image settings while calling GD? Diving into Chart.pm shows up --

sub new {
  my ( $self, $width, $height ) = @_;

  $self = ref($self) || $self;
  my $this = {};
  bless $this, $self;
-----
-----
}
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This tells me that it is taking only width, height as parameters. There are other options also but I am not sure which one to play with as I am not into OOP. Looks like it is time I learn object orientation too.