On Wed, Sep 07, 2022 at 05:03:50PM +0200, wilnerthomas--- via Users list for the GNU Emacs text editor wrote:
> 
> Sep 7, 2022, 13:34 by monnier@iro.umontreal.ca:
> 
> > wilnerthomas@tutanota.com [2022-09-07 15:23:57] wrote:
> >
> >> Sep 7, 2022, 13:14 by help-gnu-emacs@gnu.org:
> >>
> >>>> Stefan, you are right.  But it handles only lisp commands, colouring
> >>>> initial  "("  and final  ")".  But
> >>>> not for highlighting  "{"  and  "}"  for  "tex"  and  "latex".
> >>>>
> >>>
> >>> That is not my experience (from a few seconds before sending my
> >>> previous message).
> >>>
> >> What do I have to do exactly?
> >>
> >
> > I don't know.  For me it just works (I don't use rainbow-delimiters,
> > I simply turned it on to double-check my intuition before replying to
> > you, and it worked for (..), {..} and [..] in a `latex-mode` buffer).
> >
> 
> What version are you using?  Do you know where in the code the checking for "{ }" is performed?
> 
> I see 
> 
> rainbow-delimiters--propertize 
> 
> which only has 
> 
> (while (> end (progn (skip-syntax-forward "^()" end)

This is the syntax category. You can look that up in the
docs. If your buffer has the correct mode, things will
work. In your case, the mode should be latex-mode.

Please, read the docs.

Cheers
-- 
t