# colorize.rb

    #!/usr/local/bin/ruby18 -w
    require 'RMagick'

    # Demonstrate the Image#colorize method by converting
    # a full-color image to "sepia-tone"

    img = Magick::Image.read('images/Flower_Hat.jpg').first

    # Convert the color image to monochrome
    mono = img.quantize(256, Magick::GRAYColorspace)

    # Colorize with a 30% blend of a brownish-orange color
    colorized = mono.colorize(0.30, 0.30, 0.30, '#cc9933')

    colorized.write('colorize.jpg')
    exit

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