... balance font colors to reflect a positive or negative balance, i.e., green for positive and red for negative.
Please note that having fixed colours isn't a good idea for everybody. As somebody who has 'different' colour vision to the norm, I appreciate it when programmers provide me with the option of setting my own preferences. Programs which use colours such as red and green are often unusable for me.Colour blindness
"Colour blindness affects a large number of individuals ... In individuals with Northern European ancestry, as many as 8 percent of men and 0.5 percent of women experience the common form of red-green colour blindness."