A lot of the buildings do it around the holidays, or for any holiday really. You will notice some orange on halloween. green on St pats day, and so on.
because we believe in two things in chicago...money (green) and violence (red). all the buildings like to celebrate these two things. christmas...haha!! whats that? (im being sarcastic btw).
Because we are getting very close to Valentines day (red) and St Pattys day (green).
Ummm - because it s Christmas??
christmas?
Those are Christmas Colors. Where have you been?