Stop by the Goodman Theatre tomorrow between 11 AM and 1 PM, and you can dip your hand in red paint, slap it on a giant canvas, and help make painter Mark Rothko — who hung out in the dark, winced when his paintings were shown, and didn’t want to be a commodity — roll in his grave. Mayor Rahm Emanuel has declared Tuesday “Paint the Town Red Day,” in honor of John Logan’s multi-Tony-Award-winning play about Rothko, Red, opening at the Goodman this week.