Blood gets its color from hemoglobin, the protein in your red blood cells that carries oxygen throughout your body. When hemoglobin binds with oxygen, it turns bright red. When it drops off that ...

The chart below is a good a starting point ... A brownish or orange tinge is typically a symptom of older bloodshed. Blood may turn this color after it has been exposed to oxygen.

Period blood color can change from bright red to dark red, pink, or brown at different points during menstruation, though ...

Blood is often associated with the color red, but in the animal kingdom, it comes in a surprising range of hues. From the deep blue blood of horseshoe crabs to the vibrant green of some lizards ...