On this page of the docs, I don't see anything listed that seems to help you. But when I look at the convert docs, I get to the following page which defines their color-reduction algorithm.

Perhaps what you have to do is go through the color indices yourself, and copy certain values over others, thus reducing the number of unique colors in the image.

Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re: Image::Magick and colors by japhy
in thread Image::Magick and colors by geektron

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