[metapost] Problem with colors

[Troy Henderson]

Replace

label(btex \color{red}X etex, origin);

with

label(btex X etex, origin) withcolor red;

or

label(btex X etex, origin) withcmykcolor (1,0,0,0); % This gives cyan

There appears to be no built-in synonyms (although you could easily write
your own) for the base cmykcolors cyan, magenta, and yellow.  Black is
already synonymous with the RGB (0,0,0).  Specifically, you could do

cmykcolor cyan,magenta,yellow;
cyan:=(1,0,0,0);
magenta:=(0,1,0,0);
yellow:=(0,0,1,0);

label(btex X etex,origin) withcmykcolor cyan;

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Troy Henderson
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