Your calculation results in a floating-point numeric result which you are comparing to an integer. Change: 
    my $adjusted_hue = $hues[$index] + ($scaled_index - $index)*($hues
+[$index + 1] - $hues[$index]);

[download]
to: 
    my $adjusted_hue = sprintf '%d', $hues[$index] + ($scaled_index - 
+$index)*($hues[$index + 1] - $hues[$index]);

[download]

In reply to Re: Why is this comparison failing? by toolic
in thread Why is this comparison failing? by johnrcomeau

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