I thought this was interesting because I've seen it a few times when exploring abandoned houses, especially down south. Have you ever noticed how some porch ceilings (and sometimes door and window trim) are painted blue? My grandma, who is from Georgia, explained to me that Southerners paint their porch ceilings "haint blue" (a mix between the blue of the sky and the green of the ocean) to ward off any spirits that may be lurking around their homes. The theory is that since ghosts cannot cross bodies of water, the paint color will repel them.
The paint was also used to repel bugs. However, because lye isn't used in paint anymore, or at least not as much of it (I'm not a paint expert. Lol.), this no longer actually works.
Knowledge is power!!
