Emacs font lock mode: provide a custom color instead of a face

Question

On this page discussing font lock mode, an example is provided which highlights a custom pattern:

 (add-hook \'c-mode-hook
           (lambda ()
                     


        

Answer 1

(font-lock-add-keywords nil '(("\\<\\(FIXME\\):" 1 '(:foreground "blue") t)))
(font-lock-add-keywords nil '(("\\<\\(FIXME\\):" 1 '(:foreground "#F0F0F0") t)))

A full list of attributes is in the manual.