Hi Joshua,
I realized that this post is still open, sorry for the late response.
I fear the problem is due to the lacking color support regarding context
- I believe pgf as such is quite restricted in this context.
This is clearly a bug in pgf and/or pgfplots and I can reproduce the
shifts (although my context does not produce any mix colors at all for
some reason).
My first guess was to define the mix colors manually outside of the
path/plot statement. Since I am entirely unaware of the ConTeXt commands
to mix colors, I tried to invoke the PGF low level routine which mixes
colors by means of
\csname pgfutil@colorlet\endcsname{BlueMixedWhite}{Blue!50!White}
and used
\addplot+[BlueMixedWhite] coordinates {(1,5) +- (0,3)};
On my machine, the outcome has no spurious shift. I cannot verify the
color as my context produces no mix colors at all (an installation
issues for sure).
Aside from that potential workaround, I will file a bug report for
pgfplots in my to do list.
Kind regards
Christian
Am 23.01.2014 21:53, schrieb Joshua Krämer:
> Dear list,
>
> I'm using pgfplots to create some bar charts with error bars in ConTeXt,
> and I want to use custom colours for them. This works, but if I mix a
> custom colour with another colour, it results in a gap between the
> error bar line and the error bar mark. If two custom colours are
> mixed, the gap seems to be doubled. Mixing with predefined colours
> works normally. MWE:
>
> \usemodule[tikz]
> \usemodule[pgfplots]
>
> \definecolor [Blue] [h=3465a4]
> \definecolor [White] [h=ffffff]
>
> \pgfplotsset{compat=newest}
>
> \starttext
> \starttikzpicture
> \startaxis[ybar, error bars/y dir=both, error bars/y explicit]
> \addplot+[blue!50!white] coordinates {(1,5) +- (0,3)};
> \addplot+[Blue] coordinates {(1,5) +- (0,3)};
> \addplot+[Blue!50!white] coordinates {(1,5) +- (0,3)};
> \addplot+[Blue!50!White] coordinates {(1,5) +- (0,3)};
> \stopaxis
> \stoptikzpicture
> \stoptext
>
> Here you can see the result:
> http://666kb.com/i/cl86t0mfpin35tht7.png
>
> Kind regards,
> Joshua Krämer
>
>
>
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