Vitality is charaterized mainly by achieving independence (away from the others, as opposed to finding security among the others). It is achieving individuality by embracing innovation, by exploring new emotions, by an extroverted Self, not in the sense of grerariousness, but exploration of the environment.

Vitality is all about experiencing freedom, passion, adventure, buzzing about, spending energy, feeling very much alive and kicking.
The expression 'red blood' refers to vitality. Red is the colour of passion and passion runs in our blood. See also the colour of music: the red and blue sides of flamenco.
Red is an ambivalent colour. Red passion can be positive as well as negative. One can be red with anger, and one can be red-blooded, emotional, passionate and full of feelings. Wars and revolutions are red, but in Chinese new Year messages are written on red paper. Red is the colour of cardinals, the highest dignitaries of the Roman Catholic Church. Red is also tue colour of the scarlet letter, the mark of Cain.