You should be able to use Graphics::ColorNames in conjunction with GD to achieve the desired result.
Added:
#!/usr/bin/perl
use strict;
use warnings;
use Graphics::ColorNames qw( hex2tuple );
use GD;
our %COLORS;
tie %COLORS, 'Graphics::ColorNames';
my $img = new GD::Image(100, 100);
foreach my $color (keys %COLORS) {
$img->colorAllocate( hex2tuple( $COLORS{$color} ) );
}
my $apricot = $img->colorClosest(255,200,180);
print "\$apricot is supposed to be 255 200 180 but is actually @{[$img
+->rgb($apricot)]}\n";
my $reddish = $img->colorClosest(223,8,13);
print "\$reddish is supposed to be 223 8 13 but is actually @{[$img->r
+gb($reddish)]}\n";
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