Re: [NTG-context] ConTeXt-defined colours broken in TikZ in MkIV with latest betas

On 4/16/2015 9:34 PM, Christian Prim wrote:

Hi Hans

is it correct, that with the new beta one can just use rgb-colors using tikz or is there a bug preventing the usage of cmyk-colors as it used to work before?

cmyk should work ok but afaik tikz assumes rgb in some cases so that prohibits that we can do automatic conversion tp other color spaces at he context end

Thanks!

Christian

PS.: See mail below for MWE showing false cmyk colors in tikz.

2015-04-14 11:54 GMT+02:00 Christian Prim mailto:christian.prim@gmx.ch>:

Thanks Hans for clarification. But even with simple context color models (that worked before) I get other colors.

MWE:

\usemodule[tikz] \setupbodyfont[40pt] \starttext \definecolor[mycol][c=0.23,m=0.58,y=0.88,k=0.45] \definecolor[mycol_h][c=0.115,m=0.29,y=0.44,k=0.225] \definecolor[mycol_q][c=0.055,m=0.145,y=0.22,k=0.1125] \startcolor[mycol] {\bfa •••••••• Test} \stopcolor

\starttikzpicture \fill[mycol] (0, 0) rectangle (2,4); \fill[mycol_h] (2, 0) rectangle ++(2,4); \fill[mycol_q] (4, 0) rectangle ++(2,4); \stoptikzpicture \stoptext

I'm not so familiar with metafun, so I couldn't do the rectangle with metafun (the different colors between context/metafun and tikz would certainly be better visible so). But the bullet shows, that the text color isn't the same as the tikz-figure. But they should as they are identical. Something must have changed in color handling.

Christian

2015-04-14 10:42 GMT+02:00 Hans Hagen mailto:pragma@wxs.nl>:

On 4/14/2015 10:29 AM, Christian Prim wrote:

Thanks Hans for the fix!

I have noticed, that spotcolors can be used in tikz, but they are darker. Is that wanted or a bug?

they will map onto cmyk or rgb depending on definitions ... don't expect advanced context color models to work with tikz (but they do work with metafun)

Hans

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