Other mistake: After Dan visits his wife in the hospital, he goes to Alex's apartment. In the scene where he's chasing Alex and crashes into the glass door, shattering it, look closely at his face and you'll see it's not Michael Douglas but a stunt double. A few seconds later when they are struggling in the kitchen, look again and you'll see the same stunt double.
Continuity mistake: When Dan leaves the budget office in his rental car, the front license plate is mounted off to one side, unusual for this type of vehicle. When he arrives at the house, it's still the same license plate number, but the plate is now mounted on the centre of the bumper.
Chosen answer: With questions such as this, one can either speculate, or one can go directly to the source. So, using IMDb, I looked up the names of the crew on "Fatal Attraction." The costume designer is listed as Ellen Mirojnick. The set decoration was the responsibility of George DeTittas, Sr. I found Ellen Mirojnick on Facebook (https://www.facebook.com/Ellenmirojnick/posts/263462080524551?comment_id=263621453841947&offset=0&total_comments=2¬if_t=feed_comment), and posed the question to her. This was the reply she gave: " (I)n our process there is always a purpose for a palette to tell a story dramatically. I chose white for her character because white is powerful and although not essentially a "color" it reflects all other colors, which would in turn reflect where we were in the story. I thought through her silhouettes and use of shades of whites, it would reflect her mood and not give away the demon she kept hidden. WHITE is powerful... As she was!" I have not yet been able to track down Mr. DeTittas for comment. But I have posed the additional question to Ms. Mirojnick regarding whether the color palette motif was a decision shared by different departments on the film. Ms. Mironjnick added the following comments: "she wears white to discuise (sic) her darkness, that somehow is revealed in certain places.. white is all things combined .. it radiatesits (sic) the confusion as if she was in an asylum, but her own."
Michael Albert