[NTG-context] ConTeXt and cmyk

Hi all, I have reproduced a logo http://www.uvsq.fr/guide/charte/index.html (see attachment for the resulting metapost code). What's the best method to define colors according to this web page ? My understanding is: - for printing, the use of \setupcolors[cmyk=yes,mpcmyk=no,conversion=no] is the best, - for display rendering, the use of \setupcolors[cmyk=yes,mpcmyk=yes,conversion=yes] is the best. Am I right ? Renaud