Factual error: In the opening "Good Morning Baltimore" scenes you can see yellow center lines in the streets. This was supposed to be 1962, but yellow lines weren't used in the U.S. until after 1971. (01:00:00 - 04:00:00)
Factual error: The movie is set in 1962, but when Tracy misses her bus, she catches a ride on an International-Harvester truck that wasn't introduced until 1969.
Factual error: During "good morning Baltimore" number, streetcars are seen passing behind several times. However, they wear the red and cream livery of Toronto (where it was filmed), when they should be yellow.
Answer: I believe her hair is also symbolic of white and black integration.