Contains no ammonia, resorcinol or parabens Available in 31 colors, each color can be used alone or blended to create personalized hair colors Fast and easy, complete application takes less than an hour Safe to use over color treated or permed hair. Gives natural looking color variation, will not fade like other hair products. naturcolor dark caraway blonde haircolor gel used herbal-based ingredients to cover your grays and give you shiny, glossy results. This permanent color is suitable for use over most other colors or henna, and it's free of parabens and ammonia resorcinol. This 4 fl oz package contains enough product for one application to long hair or two applications to short hair.