Why is blue film called blue film?

I always thought it had something to do with blue laws, which forbade certain vulgar activities that were frowned upon by our Puritan ancestors. Blue laws weren't codified; they were a matter of regulating social behaviours, locally, as I understand (possibly incorrectly) the meaning of the term. That would lead to another question: why are blue laws "blue"?

Blue films are taken very secretly and earlier it was taken in night times or with bedlamp lights. Also Blue is a colour that can trigger sexual feelings. From then on such movies were called blue movies. But, now such films have grown up so bigger that they are now picturised even in day light. But, the name remains like that. In malayalm we call it as Neela Padam

There is no consensus as to how the term "blue film" came to be associated with obscene or pornographic movies. It is interesting to note that the first record of the color blue to refer to obscene or... keep reading →

They are called blue films as they tend to cheer you up and drive away your blues.So they were labelled Blue Films.

I dont either why it is call blue film but for me "blue film "always associated with something sexy,and not kind of porn look like or hardcore in worst