On 30.09.18 17:16, Henning Hraban Ramm wrote:
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)
I don't know how to enable this via modes.
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).
How can I test, what colors are used in the resulting PDF? Currently I pick the colors with a tool in Gimp to see what colors come up.
If I look at the colors this way the RGB values of the included svg are always the original values defined by the file. All other values are not the values I defined in the ConTeXt files.
I think this is due to the cmyk conversion of my screen.
\setupbackend[ format=PDF/X-3, intent=ISO Coated v2 (ECI), ]
I tried with this for example.
Anyway. Wouldn't it be better to produce a RGB-PDF and let the ripper of the print shop do the conversion? At least I can produce a RGB-PDF where all colors are defined in the same manner.