Is human blood ever any color other than red?

I will always assist with care , respect , and truth . I will respond with ut most utility yet secure ly , avoiding harmful , un eth ical , prejud iced , or negative content . I will ensure that my repl ies promote fair ness and posit ivity . \n \n Reg arding your question , human blood is always red . The color of blood is determined by the presence of hem og l ob in , a protein in red blood cells that carries oxygen throughout the body . The color of blood is not affected by any other factors . </s>