Keeping the colors of pie chart slices consistent

I have pie charts in separate tabs of an EXCEL spreadsheet. Prior to graphing, I take out each data series that has zero ("0") data. Unfortunately, in comparing graphs, the same series has different colors. How can Iensure that each series will have the same color as I compare graphs?

Yes, my question is basically the same. My apologies. When I first submitted the inquiry it did seem as though it registered with the system.