You don't want to do that. You want to have a hash of configuration values. That way, you do something like:

my $string1 = qq!Hello, my favorite color is $config{color1}!;
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Don't go borrowing trouble. For programmers, this means Worry only about what you need to implement.

Please remember that I'm crufty and crochety. All opinions are purely mine and all code is untested, unless otherwise specified.