Am 2018-09-30 um 15:46 schrieb Jan U. Hasecke <juh+ntg-cont...@mailbox.org>:
> Hi, > > I would like to know, how to define colors to have a good printing quality. > > I am currently producing print materials for a company where all colors > were defined for online usage first, so we started with defining RGB > colors and then derived CMYK colors. > > What is the best approach for defining colors in print materials? What > color model shall I use? RGB or CMYK? > > For the background. We have some SVG graphics we use on the website. > They are defined in RGB color model. And we use them in the print > materials as well. > > I tend to define RGB colors in my print documents so that the colors of > the included SVG files match the defined colors I use elsewhere in the > document. Eg. the Corporate-Blue of the Logo (SVG) will match the Blue > of the headlines. > > I could as well define CMYK colors in the document but then I have two > different color models in one document and I fear that the colors are > printed in different hues. > > What would you do? Hi juh, you can define colors in several color models at once; CMYK makes most sense for professional printing. e.g. \definecolor[CompanyBlue][r=0,g=0,b=1,c=1,m=1,y=0,k=0] and see https://wiki.contextgarden.net/Command/setupcolors (I would activate rgb or cmyk colors via modes, if you produce different media) CMYK colors in SVG are difficult (I needed them in 2005, nowadays there’s a hardly supported standard for icc profile based colors). e.g. https://stackoverflow.com/questions/3405689/svg-image-with-cmyk-colours-is-it-possible https://www.w3.org/TR/SVGColor12/#icc-colors Something about color profile handling in ConTeXt: https://wiki.contextgarden.net/PDFX Now you must decide if you want to go the PDF/X-1a route (device dependent CYMK values) or PDF/X-3 (profiled colors). Luckily I never had to match corporate colors of different models in ConTeXt... Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________
