Two questions about color in MetaFun

From: "Jairo A. del Rio" <jairoadelrio6@gmail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Two questions about color in MetaFun
Date: Thu, 13 Aug 2020 17:48:59 -0500	[thread overview]
Message-ID: <CAKyqqaaNUHuogWMAOZw1sWruCkg_4Jhh-ptUU=uxdc-c3M5m_Q@mail.gmail.com> (raw)

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Hi, list! I have two questions concerning MetaFun:

1st:

What is the correct way to pass a ConTeXt named color (e.g. xwi's "maroon")
to MetaFun. Using (with \usecolors[xwi] loaded in the preamble):

withcolor maroon

does not work. I could copy-paste definitions from ConTeXt sources and do
e.g.

\definecolor [maroon][r=.690196,g=.188235,b=.376471]

but it is unfeasible for complete color schemes. So, is there a better way
to do it?

2nd:

I was trying to do some stuff for my girlfriend using ConTeXt and I tried
to randomize colors in MetaFun using normaldeviate. However, something
interesting happens. The following:

\setuplayout[width=middle]
\setuppagenumbering[state=stop]
\setuppapersize[A10,landscape][A10,landscape]
\starttext
\startuseMPgraphic{cornystuff}
draw outlinetext.f ("\framedtext[frame=off,width=fit,align=middle]{I love
you \\ \CONTEXT}") %\CONTEXT is not my girlfriend, it's just for the example
(withcolor (normaldeviate,normaldeviate,normaldeviate) withpen pencircle
scaled 1/5)
scaled 1 ;
\stopuseMPgraphic
\dorecurse{20}{%
\startplacefigure[location=force,number=no]
\useMPgraphic{cornystuff}
\stopplacefigure
\page[yes]
}
\stoptext

changes the color of every letter. I don't complain (in fact it does look
better), but I still have a question: what should I do if I wanted to
select a random color first and then use it for the entire content? Thanks
in advance.

Jairo :)

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