plain TeX: "color" also colours page number

[David Carlisle]

you can fix the page foot to be black but to get any reliable output at all
from the document you also need to fix all the unclosed groups

### simple group (level 17) entered at line 121 ({)
### simple group (level 16) entered at line 113 ({)
### simple group (level 15) entered at line 106 ({)
### simple group (level 14) entered at line 98 ({)
### simple group (level 13) entered at line 91 ({)
### simple group (level 12) entered at line 83 ({)
### simple group (level 11) entered at line 76 ({)
### simple group (level 10) entered at line 68 ({)
### simple group (level 9) entered at line 61 ({)
### simple group (level 8) entered at line 53 ({)
### simple group (level 7) entered at line 46 ({)
### simple group (level 6) entered at line 38 ({)
### simple group (level 5) entered at line 31 ({)
### simple group (level 4) entered at line 23 ({)
### simple group (level 3) entered at line 16 ({)
### simple group (level 2) entered at line 8 ({)
### simple group (level 1) entered at line 3 ({)
### bottom level

I closed them all at the end although it's not clear why you have a {
before every \textcolor
so perhaps you wanted to close some earlier.


So you need

\footline={\hss\textcolor{black}{\tenrm\folio}\hss}

as the first line, to normalise the color in the page foot and

}}}}}}}}}}}}}}}}}%??????????????????

just before \bye to close all the open groups



On Wed, 23 Jul 2025 at 20:49, Rodolfo Medina <rodolfo.medina at gmail.com>
wrote:

> In the simple example I'm attaching, to be processed with simply `tex
> file',
> using `color' plain TeX package, the page number is also coloured, that I
> don't
> want: how can I avoid it?
>
> Thanks,
>
> Rodolfo
>
>
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