Given the ambiguity, my approach should be to address both possibilities but steer towards the non-explicit interpretation if that's safer. However, I should also check if there's a known list of classic or vintage films known for their use of blue or any other blue-related aspect.

The recommendations include iconic titles like Deep Throat (1972), The Devil in Miss Jones (1973), and Behind the Green Door (1972), but also offers lesser-known gems from the 1960s and 70s that feature real narrative ambition, jazz-infused soundtracks, and 35mm cinematography. Each film is introduced with notes on its production, director’s intent, and its role in challenging censorship laws.