bug#49567: outline level colours variability across major modes

[Kévin Le Gouguec]

lisa-asket@perso.be writes:

> Have seen that outline level colours change according to the major made.  I 
> do not like this, because
> I would like that outline colour levels be consistent across major modes. 

Have you tried tweaking outline-minor-mode-highlight (introduced in
Emacs 28, i.e. on the master branch)?  Setting it to 'override (and
reloading outline-minor-mode) does exactly what you would like, AFAICT
from reading the docstring, and trying it out.

> Currently there is no facility for someone to define their own outline level 
> colour schemes
> that in fixed across major modes.

Wouldn't customizing outline-[1-8] faces (plus setting
outline-minor-mode-highlight to 'override) allow exactly that?