Am 2018-09-30 um 15:46 schrieb Jan U. Hasecke firstname.lastname@example.org:
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?
you can define colors in several color models at once; CMYK makes most sense for professional printing.
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-i... 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...