I have been using the below to do a color conversion

```
    if @image.colorspace == Magick::CMYKColorspace
      # @image.colorspace #=> CMYKColorspace=12
      @image.colorspace = Magick::RGBColorspace
      @image = @image.negate
    end

```

It works, approximately, but the color luminosity is off. The fact that I need to negate the image leaves a very bad smell.

The documentation mentions using color\_profiles, but beyond that I can not find much.

I am now trying

```
@image = @image.quantize(16777216, Magick::RGBColorspace)

```

And the colors are better, but still off.