Adding additional highlighted keywords in Emacs+AUCTeX messes up conventional highlighting. My code:
(defvar my-new-face (make-face 'my-new-face))
(defvar my-another-new-face (make-face 'my-another-new-face))
(set-face-background 'my-new-face "Aquamarine")
(set-face-foreground 'my-new-face "Black")
(set-face-background 'my-another-new-face "Plum")
(set-face-foreground 'my-another-new-face "Black")
(font-lock-add-keywords
'latex-mode
'(("\\\\quad" 1 my-new-face prepend)
("\\\\label" 1 my-another-new-face prepend)))
Any suggestions how can I overcome this. Adding user keyword classes in Auctex customization menu doesn't highlight them in math-mode.