Haint blue on Southern US porch ceilings is a similar approach, to trick ghosts and for aesthetics. https://en.wikipedia.org/wiki/Haint_blue https://en.wikiped

Haint blue on Southern US porch ceilings is a similar approach, to trick ghosts and for aesthetics. https://en.wikipedia.org/wiki/Haint_blue https://en.wikipedia.org/wiki/Haint_blue