In an article in Set Decorator Magazine, production designer Pan Lai explains how they came up with the palette for the movie.
‘…Her sleeveless cheongsam of electric blue moiré satin…A brooch fixed to the collar matched her diamond-studded sapphire button earrings….’
The blue color scheme via Wong serves as the main melody to bridge the story’s five-year time span and the two locales: subtropical Hong Kong with its colonial influence under British rules and Shanghai under occupation and segregated by America, England, France, and Japan.”
Therefore, I chose a blue color tone as the key theme for Lust, Caution and let the lead female character, Wong Chia Chi, take it throughout the movie’s time and space.image source
I find it fascinating to read about the underlying design motives for color decisions in movies. Next time you are watching a movie, test your attention to detail and see if you can pick out the color themes. It's a fun way to sharpen your color sensitivity.