Another perspective -- since red and green are very universal colors for success/failure, stop/go, etc., you could also choose to keep the red and green colors but change the dots to a checkmark and X glyph (or similar).
Yep, just made this change actually. I agree with the universality of the meaning of red and green. I also liked using those colors since it makes the resulting table much quicker to scan. Changing the marks from circles to useful symbols is probably much better than coming up with arbitrary success/failure colors. Thanks for the tip!