Happiness activates the whole body as represented by the colors yellow (highest level of activity) and red. Other emotions light up fewer areas. Black is neutral, while blue and light blue indicate lower and very low activity respectively. So the tingly feeling of happy all over is substantiated by science. (“Bodily maps of emotions,” by Lauri Nummenmaa, Enrico Glerean, Riitta Hari, and Jari K. Hietanen, 2013)