Conditional Format Formula

I need help writing two conditional format formulas. One formula needs to highlight column (A) if the percentage is improving and getting closer to zero than column (B) and as well column (C). For example A=1 B=-3 and C=2, column (A) would highlight green since it's getting closer to zero it's trend is improving. The other needs to do the opposite were if A=-4 B=-2 and C=-3 column (A) would highlight red because it is not the closest to zero it's trend is further away.