[Jamestown1630]

One explanation for painting everything blue there is that it creates a psychological sense of coolness, in a place where it gets so hot.

(I’ve heard that in the South of the US porch ceilings are often painted blue because it causes the bugs to fly up there, and not bother you while you’re sitting on the porch...and ‘bottle trees’ used blue bottles to attract bad spirits...)

[Macho MAGA Man]

(I’ve heard that in the South of the US porch ceilings are often painted blue because it causes the bugs to fly up there)

All true, especially in Louisiana.

[shoff]

I’ve seen the blue porch ceilings here in NY and could never figure out why. Thanks now I know, don’t know whether it works but it makes sense.

[Texan5]

I heard about the blue ceilings as a kid from a great aunt who lived in Mississippi as a child-I have no idea if it is true or not, but it does make sense in a world before insect spray...

[Savage Beast]

Gee I've never seen that in my entire life.

I have seen doors painted hant blue.