Making text invisible

[Bill Wohler]

I'd like to make some text invisible. I do want to use defface since
the user might not want this text to be invisible. I just want the
default to be invisible.

One thing I thought of was to define the text's face with the same
foreground as the default's background, as in:

    (defface mh-folder-sent-to-me-hint
      '((t
         (:foreground (face-attribute 'default :background)))))

Unfortunately, defface expects the color to be a string.

Thoughts?

-- 
Bill Wohler <wohler@newt.com>  http://www.newt.com/wohler/  GnuPG ID:610BD9AD
Maintainer of comp.mail.mh FAQ and MH-E. Vote Libertarian!
If you're passed on the right, you're in the wrong lane.