Bruises shift through a predictable sequence of colors as they heal: red, then dark blue or purple, then violet, green, dark yellow, and finally pale yellow before disappearing entirely. This whole process typically takes about two weeks. Each color reflects a different stage of your body breaking down trapped blood beneath the skin.
Why Bruises Change Color
When you get hit hard enough to break small blood vessels under the skin, blood leaks into the surrounding tissue. That trapped blood can’t be flushed away through your circulatory system, so your body has to break it down chemically, right where it sits. The color you see at any given moment is determined by which breakdown product is dominant.
Fresh bruises look pinkish or red because of the oxygen-carrying protein in your red blood cells. Within a day or two, that protein loses its oxygen and changes structure, turning the bruise dark blue or purple. This is the stage most people picture when they think of a bruise. As your body continues dismantling the protein, it converts into a green-tinted pigment, which is why bruises take on that greenish hue after several days. The final breakdown product is yellow, which is why older bruises fade to a yellowish or brownish tone before vanishing.
The Color Timeline
While every bruise is a little different depending on its size, location, and your overall health, the general progression looks like this:
- Day 1: Pinkish or red, sometimes with slight swelling
- Days 1 to 3: Deepens to dark blue or purple
- Days 4 to 7: Shifts to violet, then green as the blood proteins break down further
- Days 7 to 14: Fades to dark yellow, then pale yellow
- Around 2 weeks: Color fully disappears
Larger bruises often take longer to resolve because there’s simply more trapped blood for your body to process. A deep bruise on your thigh from a hard fall may linger for three weeks or more, while a small bump on your forearm could clear in under ten days. You may also notice multiple colors at once in a large bruise, with the edges healing faster than the center.
How Skin Tone Affects What You See
The classic red-to-purple-to-green-to-yellow progression is easiest to observe on lighter skin. On darker skin tones, the same chemical process happens underneath, but the melanin in the outer layers of skin can mask the color changes, making bruises harder to see visually. Research using precise color-measuring instruments has confirmed that bruises on darker skin still follow the same progression, but the yellowing stage in particular is nearly impossible to detect with the naked eye due to skin pigmentation.
If you have a darker complexion, you may notice bruises primarily as areas of slightly darker or slightly different-toned skin rather than the vivid purples and greens that show up on lighter skin. Swelling and tenderness are often more reliable indicators than color in these cases.
Bruises vs. Other Types of Skin Bleeding
Not every red or purple mark on your skin is a standard bruise. There are a few related but distinct types of bleeding under the skin worth knowing about.
Petechiae are tiny red dots, usually smaller than a pinhead, caused by broken capillaries. They often appear in clusters and don’t follow a bump or injury you can remember. Purpura are flat, purple-colored patches larger than petechiae but still distinct from a typical bruise. A standard bruise (called an ecchymosis in medical terms) is the largest of the three and is usually the result of a clear impact.
One simple way to tell bleeding under the skin apart from ordinary redness or irritation: press on it. Redness from inflammation will briefly turn pale when you push on it, then return. Bleeding under the skin stays the same color no matter how much pressure you apply. If you’re seeing unexplained petechiae or purpura without any obvious cause, that pattern can sometimes signal a problem with clotting or platelet function.
Why Some Bruises Look Worse Than Others
Several factors influence how dark or dramatic a bruise appears. Thinner skin bruises more visibly, which is why bruises on the backs of your hands or inner forearms often look worse than bruises on your thighs or buttocks, even from a lighter impact. Age plays a role too: as skin thins and loses fatty padding over the years, bruises tend to appear larger and darker.
Blood thinners, including aspirin and common anti-inflammatory medications, make bruises more pronounced because they slow clotting at the injury site, allowing more blood to pool before the leak seals off. The location on your body matters as well. Areas with more blood supply, like your face, bruise dramatically but often heal faster than bruises on your lower legs, where circulation is slower.
A bruise that hasn’t started changing color after five to seven days, or one that seems to be growing rather than shrinking, is worth paying attention to. The same goes for bruises that appear frequently without any clear cause, which can occasionally point to nutritional deficiencies or underlying blood disorders.