Other mistake: In the scene where you first see Tracy in class, one of the boys speaks and the subtitles reads," Ms. Whimsy, I can't see the board again." When Tracy says it, the subtitle reads Wimsey.
Continuity mistake: At the beginning when Tracy hasn't even been shown yet, you see some people pulling open a window gate, and the window has a new sign and a couple sale signs on it. Later in the film, when Tracy is singing 'Good Morning Baltimore', she passes by the same place. Only this time the window gate is closed again. (She leans up against it and grabs it.) (00:01:00 - 00:03:40)
Revealing mistake: During "You're Timeless To Me," It shows the house lights on. In the very end of the song, when Wilbur blows out the candle, it is pitch black, but the house lights should still be on.
Character mistake: When Tracy's mom enters Motormouth Maybelle's place she is surprised to see her daughter. When she calls to her she says, "Tracy Edna Turnband" instead of "Turnblad."
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)
Continuity mistake: In "Welcome to the 60s" where they enter Mr. Pinky's Hefty Hideaway and Edna is given the contract, she switches her purse to her other hand. Then the camera angle switches from Edna to Mr. Pinky and then back again. The second time, she switches her purse again.
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.
Continuity mistake: When Inez is singing in "Run and tell that", Link's arms are going from being crossed to hanging down between the shots.
Continuity mistake: When Tracy stops to sing at the music store, the lights are on and people are inside. In the next shot, when Tracy runs across the street, the store is dark.
Answer: I believe her hair is also symbolic of white and black integration.