We're having a screened porch built, with a beadboard ceiling. I have heard that there is a color of blue that repels spiders and other bugs. I'm thinking it may be a robin's egg blue, but I'm not sure, and I'm also not sure whether this is true or just an old Southern wives' tale. Three different contractors who bid on our project said they were familiar with this, but could not tell me what shade of blue.

A marketing idea