colors fade in cmyk export as tif

[behzad]

Hi, I am trying to get the best colors, closest to the original RGB
as I can. As you can see the CMYK export from xara desaturated
lot of colors.

I know How RGB and CMYK works and CYMK colors are hard to match RGB ones, but there must be a way to get the closest resemblance to RGB when exporting as tif CMYK?