Black-and-gray (also black-and-grey, black and grey/gray) is a style of tattooing that uses only black ink in varying shades.

The style is said to have originated in prisons where inmates had limited access to different colors of ink, which then became widely popular in tattoo parlors outside of prison.

Typically, black and gray tattoo work is produced by diluting the black ink with distilled water in various proportions, creating a “wash”, lighter shades can be produced. Some artists mix white ink with black to produce a gray shade, but it is not the traditional method.

After a tattoo has been completed with varying degrees of black, highlights are often added using white. White ink can also be used to smooth out sharp transitions between the different shades.