Within hours a bruise will turn into a dark blue or purple color. As the bruise begins to heal it changes colors. The color change is due to the biochemical breakdown of hemoglobin that is found in the blood. As the different components of the blood are broken down, different colors will appear in the bruise.

Does a bruise getting darker mean its healing?

As the body heals and breaks down the hemoglobin, or compound that gives blood its red color, the bruise will change in color. This is a regular part of the healing process. However, skin color affects the appearance of a bruise.