#!/usr/bin/perl

use v5.12.2;
use warnings;
use strict;

use HTML::Template;

my $t = HTML::Template->new(
  filename => q{my_template_list.html},
);

my @colours = qw{red orange yellow green blue indigo violet};

# build an array of hashes (AoH)
my @colour_params;
for my $colour (@colours){
  push @colour_params, {colour => $colour};
}

$t->param(colours => \@colour_params);

my $output = $t->output;

say $output;