Black, navy, chocolate and plum offer different kinds of depth. Compare their undertones before choosing a dark colour as the main field of a design.
Check lower light
Dark colours can appear similar in a small photograph. View the product close-up and compare a lighter neighbouring shade to reveal the colour family.
Keep details readable
Use a distinctly lighter accent if the design contains fine lines. A dark-on-dark pattern may need a change in finish to become visible.