BLUE WITCHES SALT. Blue Salt is used to protect against the Evil Eye, for Healing and Justice in court.. It can be placed under the bed, to help heal. How to make: In a Mortar and Pestle blend together Sea Salt (or any Salt of your choice) and Blue Flowers or Herbs of your choosing such as Blue Thistle or Blue Iris, along with blue food coloring if you so choose. While blending keep your intent of what you will be using the salt for in mind, placing all your energies into the Salt.