Remove the if after the declaration of $color. It serves no purpose and is leading to the error: 
my $color = shift;

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If you were ever to need initialize a variable conditionally, be sure to use the ternary operator 
my $variable = $condition ? 'value' : undef;

[download]

In reply to Re: Closure warning with Perl 5.14? by wind
in thread Closure warning with Perl 5.14? by BerntB

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