Alan BRASLAU wrote:
No, ppchtex is not dead...

I would like to use color.

1. color= and rulecolor= does not appear to be implemented (mkiv)...
2. how can one change the color of the bonds?
3. using \color[red]{} causes the text to be offset.

"minimal" example:

\setupcolors[state=start]
\usemodule[chemic]
\starttext

\startchemical
        \chemical[ONE,SB,Z0][C]
\stopchemical

\startchemical
        \color[red]{\chemical[ONE,SB,Z0][C]}
\stopchemical
% text "C" is offset...

\startchemical
        \chemical[ONE,SB,Z0][{\red C}]
\stopchemical
% OK, but I would like to draw the bonds as well in red.

\startchemical[color=red]
        \chemical[ONE,SB,Z0][C]
\stopchemical
% "C" is red in mkii, black in mkiv

has to do with different color mechanism ..

path line 1171:

\setbox2=\hbox{\@@dochemicalcolor$\@@dochemicalstyle{\@@localchemicalformat \chemicaltext}$}%


\startchemical[rulecolor=red]
        \chemical[ONE,SB,Z0][C]
\stopchemical
% bonds are black, "C" is red in mkii, black in mkiv

\stoptext

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If your question is of interest to others as well, please add an entry to the 
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archive  : https://foundry.supelec.fr/projects/contextrev/
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