Shading in traditional tattoos is the technique of adding depth, dimension, and texture to a tattoo design. This is done by adding black, grey, and white pigments to the outline of the design. The goal of shading is to give the tattoo its three-dimensional look and feel. Tattoo shading can be done in a variety of styles, such as cross-hatching, dotting, or stippling. It is also possible to use a combination of these techniques to create a unique look.