links.mimuki.net

According to Turkish belief, blue acts as a shield against evil and even absorbs negativity.

[...]

The mythology behind it says that if one of the beads breaks down, it means a very strong nazar has hit the wearer, and the bead stored it all up and broke down in order to protect them.

A third characteristic is to bead a mistake into the work. This action guards against hubris and excessive pride by affirming that only the Creator can make something that is perfect. These misplaced or miscoloured beads are often called “Spirit beads”.