in the very early days of the transition from black and white to color tv, scammers used to go door-to-door selling these three strips of clear plastic. the bottom strip was light brown, the middle strip was pale pink and the top strip was light blue.
the idea was, you'd tape it up on the black and white screen. and on average, peoples' faces would appear in the middle bit, so they'd be pink.
Church of the SubGenius Members-Only MastoDobbs.