You can add a color # 8, but you also need to edit Window_Message, line 104
# if color >= 0 and color <= 7
if color >= 0 and color <= 8
Or, since the method "text_color" is safe (will always return a color),
meaning it will return 'normal_color' if it doesn't find your # in the case statement,
you could delete Window_Message lines 104 & 106, the 'if' & 'end' statements,
then add as many colors as you want to text_color.
Be Well