Am 30.06.2025 um 05:32 schrieb Emanuel Han via ntg-context:
I want my custom color rose_color to be applied for background color for \framed inside lmt_text. For fill fullcircle, it works. With predefined colors as green, it works.
\starttext
\startMPcode
color rose_color; rose_color = 1/256(255,204,255);
%not working draw lmt_text [text ="\framed[background=color,backgroundcolor=rose_color,frame=on, location=low]{a rose box}",];
%working draw lmt_text [text ="\framed[background=color,backgroundcolor=green,frame=on, location=low] {a green box}",] shifted (1cm,1cm);
%working fill fullcircle scaled 2cm shifted (0,3cm) withcolor rose_color;
\stopMPcode
\stoptext
The color modes in TeX and MetaPost are separate systems and while you can't use MetaPost defined colors in TeX the reverse is possible, to use TeX defined color use \MPcolor{...} or "...". %%%% begin example \starttext \startMPcode draw fullcircle scaled 1cm withcolor red ; % MetaPost color draw fullcircle scaled 2cm withcolor \MPcolor{green} ; % TeX color draw fullcircle scaled 3cm withcolor "blue" ; % TeX color \stopMPcode \stoptext %%%% end example A new feature in LMTX is to create TeX based colors in MetaPost with the definecolor function but you can only use it within MetaPost. %%%% begin example \definecolor [my_red] [r=1] \definecolor [my_blue] [b=1] %\definecolor [my_blue] [c=1] % possible \starttext \startMPcode definecolor [ name = "my_green", g = 1 ] ; %definecolor [ name = "my_blue", g = 1 ] ; % not possible \stopMPcode my_red \doifelsecolor{my_red} {does}{doesn’t} exist.\par my_green \doifelsecolor{my_green}{does}{doesn’t} exist.\par my_blue \doifelsecolor{my_blue} {does}{doesn’t} exist.\par \startMPcode draw fullcircle scaled 1cm withcolor "my_red" ; draw fullcircle scaled 2cm withcolor "my_green" ; draw fullcircle scaled 3cm withcolor "my_blue" ; \stopMPcode \stoptext %%%% end example Wolfgang