How to shade inside a Venn area

[uneakbreed]

Good afternoon. I was really hoping someone could help me out. We're trying to create a simplified and interactive interface to show our staff's metrics. The metrics are grouped into three main categories and as they get closer to hitting their goal, the closer the Venn area gets to the 0, 0 xy.

What my boss' boss is looking for is to see if there is ANY WAY I can shade the inside of the Venn area (where all 3 circles converge), or, shade every other than the venn area?


I'm not sure how to attach it but the document is here (excel 2010) and I would really appreciate any help I could get. Thank you.

 

[shg]

Also posted at http://www.excelforum.com/excel-charting/800372-shading-the-inside-of-a-venn-area-chart.html