$ perl -E '
    use warnings;

    my @rgb = qw{#ff0000 #00ff00 #0000ff};
'
Possible attempt to put comments in qw() list at -e line 4.

$ perl -E '
    use warnings;

    my @rgb;
    {
        no warnings "qw";
        @rgb = qw{#ff0000 #00ff00 #0000ff};
    }
'