These quotes come from a book review of “Black Swan” in Vanity Fair magazine, January 2011 edition. The writer of the review is James Wolcott and I found his views on the film interesting and very in depth;
The film makes a meal out of the dualities and polarities in the Tchaikovsky ballet-good and bad, salvation and damnation, noble renunciation and bedeviled seduction-black and white are not its primary colours. Pink and red are.
Pink is the infantilizing colour of the dollhouse bedroom where Nina falls asleep to the music-box sounds of Swan Lake on her bedstand…It is when pink darkens to red that Black Swan takes the traditional ballet film and goes hypodermic.
When Natalie Portman finally takes possession of her dark side, her eyes turn devil. Slashing its way to the finish line, Black Swan is the first ballet movie for highbrow horror fans for whom ballet itself signifies little to nothing. Those of us who know and love ballet can only look on it with a different kind of horror.