By default each cells is colored according to the rule table index that was ``looked up'' to determine the cells value, in other words the cell's neighbourhood at the previous time-step. These colors are assigned from a palette of 16. Alternatively the cell's may be colored by value, 0-grey and 1-blue. The following prompt is presented in a top right window,
FORWARD ONLY: color cells by vale-v, (default by nhood):