Keith's note: Contrary to what some websites are reporting (including this one) NASA PAO says that the white/black coloration of the SLS stages that evokes memories of the Saturn V is there for the same reason: to aid in tracking during ascent. There will be no spray-on foam on the first (or second stage ) as was the case with the Space Shuttle and Ares V - hence no orange on the SLS.

Keith's update: Well despite the official PAO response, I am now told by several people at NASA with the utmost reliability and knowledge on this issue that the depiction of the SLS in Saturn V-esque paint scheme was done at the discretion of the graphic artist to evoke memories of the Saturn V. My understanding is that they will paint it - but what it will look like no one really knows.

I guess the only way to get a straight answer on this is for someone to ask Bill Gerstenmeier - on the record.