In internet terminology, particularly in South Asia, the term "blue film" is often used to refer to adult or pornographic videos.
To watch Mahima Chaudhary in Pardes or Dhadkan is to watch a masterclass in restraint. Her blue is never neon; it is always twilight. And so, the best vintage movie recommendations for a fan of this aesthetic are those films that are willing to be slow, to be sad, and to be stunningly beautiful in that sadness. They are films where the sky is always threatening rain, where the heroine’s dupatta always catches the wind, and where the final frame fades not to black, but to a deep, resonant blue.