On 11/12/2018 9:02 AM, Jan U. Hasecke wrote:
Hi all,
with the following file I tested the color conversion of context.
I get the same CMYK-values in the output pdf file using different color profiles. A friend of mine can test the color values of PDF with a special software.
My guess: the profiles are not used during pdf generation. You can test this by commenting/uncommenting the other profile.
I created the files with
context --mode=print example.tex
My context version is mtx-context | ConTeXt Process Management 1.02 mtx-context | current version: 2018.08.30 18:41
Is this the correct way of producing cmyk-pdfs?
I am missing the declaration of the RGB color profile. When doing color management in Scribus I define two profiles: one for RGB and one for CMYK. AFAIK you need both to convert rgb to cmyk.
Any hints?
it's probably better to define hs-dunkelblau etc in cmyk color space then
juh
--- example.tex ---
\definecolor [hs-logoblau] [r=0.000, g=0.314, b=0.580] \definecolor [hs-dunkelblau] [r=0.258, g=0.474, b=0.737] \definecolor [hs-hellblau] [r=0.6, g=0.737, b=0.858] \definecolor [hs-orange] [r=0.866, g=0.286, b=0.003]
\startnotmode[print] \setupcolors[cmyk=no,rgb=yes] \stopnotmode
\startmode[print] \setupcolors[cmyk=yes,rgb=no] \setupbackend[ format=PDF/X-1a:2003, % intent={ISO Coated v2 300\letterpercent\space (ECI)}, intent={SWOP2006_Coated3v2.icc}, ] \stopmode
\setuppapersize [A4] [A4]
\starttext
\blackrule[width=3cm,height=1cm,depth=0pt,color=hs-orange] HS Orange r=0.866, g=0.286, b=0.003 \blank
\blackrule[width=3cm,height=1cm,depth=0pt,color=hs-logoblau] HS Logoblau r=0.000, g=0.314, b=0.580 \blank
\blackrule[width=3cm,height=1cm,depth=0pt,color=hs-dunkelblau] HS Dunkelblau r=0.258, g=0.474, b=0.737 \blank
\blackrule[width=3cm,height=1cm,depth=0pt,color=hs-hellblau] HS Hellblau r=0.6, g=0.737, b=0.858
\stoptext
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