Reputation question

I have a reputation point, that when I am in my cp and it shows the most recent reputation, it is gray/blue, where all the others are green. I don't know if this means it is a disagree or negative reputation or what. I am thrown, if it means it was negative, that would be no big deal, except to comment is positive and says they agree with what I wrote. Just wanting some clarity. Thanks so much for your help. Sincerely, Carolyn