"emacs-28.0.50 -q" and "emacs-28.0.50 -Q" with outline-minor-mode-highlight

[pauline-galea]

Have loaded emacs with "emacs-28.0.50 -q" and "emacs-28.0.50 -Q"

Loaded an elisp file with the following code

;;; * heading 1
;; brief
;;;; ** subheading 1.1
;; brief
;;;;; ***subsubheading 1.1.1
;; brief

Then used the command

M-x outline-minor-mode

Then executed

(setq-default outline-minor-mode-highlight 'override)

with C-x C-e

But the different highlight levels are not being highlighted with different 
colours.