This ink is perfect for honing your skills and experimenting with new techniques without worrying about using it on human skin. Please note, this product should not be used on actual tattoos. Ensure you make the most of this opportunity to practice with high-quality ink at a fraction of the cost. On coloring, Darkest Brown is a warm color that can be used for eyeliner, as a dark brow color or even to help darken certain lip colors.