On Mon, 26 Jul 2021, Gavin via ntg-context wrote:
> 2) While I’m having good luck with paths, colors are causing trouble. In the
> data set the color information is in strings with French names of the color,
> like “rouge.” If I hand this string to MetaPost, MetaPost doesn’t expand it
> into a color. It does work if it is a native color, like “red,” but not if it
> is a defined color and not if the color is in a Lua variable. Any suggestions?
\definecolor[rouge][red] should work. A better option will be use color
palettes.
This is very old code, but will give an idea of how to use palettes:
https://github.com/adityam/visualcounter/blob/master/visualcounter.pdf
Effectively all you need to do is add \setuppalet[name] at an appropriate
place, and then the user can easily change the colors (rather than having them
specified as part of data files).
Aditya
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