Why are the lenses in Velmas glasses tinted blue?
This actually has more to do with Hanna-Barbera’s animation techniques that Velma starting a new fashion trend in eye-wear! In almost all of the old HB cartoons, glasses were tinted like that. It helped define that they really had glass in them. (Ironic, as most glasses nowadays are not made with glass lenses.) The technique was dropped on most newer cartoons, but became such a part of Velma’s character, that even in the latest movie, “The Witch’s Ghost”, she is drawn with the tinted lenses. This, despite the fact that Ben Ravencroft, who also wore glasses in the flick, is drawn without the classic lens tint. When Velma accidently ends up with his glasses, the tint is gone!