Color well – color wise launched by Cosmetics Europe, the Personal Care Association in Europe, provides important information about how to color your hair safely. You will find information on what you need to remember every time before coloring your hair and why you should do an Allergy Alert Test prior to applying a hair coloration. A detailed question and answers section covers a wide range of topics, such as why 'black' henna tattoos may increase your risk of experiencing an allergic reaction when you color your hair.