The answer given isn't adequate. The problem I see is pale grey text on a white background, and it's laborious to see it.
I want black text on white background, which is significantly easier to see.
I'm colorblind, so your embedding information in colors is information probably lost on me.
If plus and minus symbols don't suffice, then make the font bigger or bold for important stuff, or use (parentheses) or {braces} or [brackets] or an *asterisk.
I have enough problems to figure out doing my taxes. Turbotax doesn't have to make it harder by using invisible ink.
