The building's new look includes restored exterior steel beams which were sun-bleached to grey but have now been returned to their original black colour.
Lower glass panels, installed in an earlier 1974 renovation by Skidmore, Owings & Merrill, have been replaced with thicker, sandblasted windows, which are more translucent and will create fewer interior reflections.
In addition, the upper-level louvres have been refurbished and the ceiling freshly painted white.
The building will officially open to the public on August 27 with a day of festivities to celebrate the restoration.
The IIT will soon begin the next phase of renovation, in which the Crown Hall's technical and energy systems will be upgraded.