Virgin hair can be colored. Since all hair is natural and can vary, some hair may be harder to lift than others. Always remember you can only go 2 to 3 levels lighter with virgin #1B hair. To go lighter will require bleaching, which should be left to licensed professionals.
Colored hair should not be colored. Since the hair has already gone through one chemical process to achieve the color, treating it again could lead to undesirable results.
Our advice is to always have your hair colored by a licensed professional or hair colorist. If you do decide to color your hair on your own, we always recommend you perform a strand test on a small section of the hair. If you need advice, give us a call or contact a professional for more help. Please keep in mind, once hair has been colored your return or exchange is void, and we are limited in how we can help if a problem arises.