Hi
I have this problem to show colors properly. I have defined color "myred",
 but after \showcolor command  colors inside metapost can't be displayed.

Thanks

\starttext


\definecolor[myred] [r=.8]

 \showcolor


\startuseMPgraphic{test}

  fill fullcircle scaled 10mm withcolor \MPcolor{myred};

\stopuseMPgraphic


\midaligned{\useMPgraphic{test}}



\stoptext