I read the following in an article from DermaDoctor:
"Once you’ve dried it out, it’s time to cover it up. One of the trade secrets of makeup artists who work on movie stars is Visine. The same stuff that “gets the red out” of your eyes can help get the red out of your face. After you’ve done your best to dry out the pimple, soak a cotton swab in Visine. Then hold the swab to the affected area for about ten seconds. The redness will disappear."
I've tried it off and on. It's not immediately noticable, but the redness does go away.